Common Outlook Outgoing Server (SMTP) Errors

Last reviewed on October 2, 2014   —  131 comments

When you are checking for new mail you might receive one of the following errors.

Tip: In many cases error codes are identical between Outlook and Outlook Express. If you search Bing for an error code and find a site which discusses Outlook Express, check it out. Because Outlook and Outlook Express both use the same underlying technology, the cause and the solution may be the same for Outlook.

Error Codes

#5.5.0 smtp;553 sorry, that domain isn’t in my list of allowed rcpthosts (#5.7.1)
This means the server you are trying to send to is blocking mail sent from your server. You’ll need to contact the recipient’s administrator or send your message using a different mail server.

553 5.7.1 Sender address rejected: not owned by user
This means you are not using the correct outgoing (SMTP) server authentication settings.
In Outlook 2007, go to Tools, Accounts Settings. In Outlook 2010 and 2013, go to File, Account Settings. Double click on the email account then click More Settings. Select Outgoing Server tab. Select Log on using and enter the username and password that can send using this SMTP server. Enable SPA only if your server supports it.

Mail server errors

Task – Sending reported error (0x80042109) : Outlook cannot connect to your outgoing (SMTP) e-mail server.
Check your outgoing server name, the port number and SSL setting, and the authentication setting. Open the Account Settings dialog, double click on the affected email account. Is the server name correct? Click the More Settings button. Check the authentication settings on the Outgoing server tab, and the port number and SSL settings on the Advanced tab.

Error 0x800CCC0F when sending or receiving email.
Usually caused by Antivirus software scanning email, but antispam scanners may cause Outlook to return this error as well. Disable the email scanning or increase the timeout setting. Also, make sure your firewall is allowing the scanner software to connect to the Internet.

Error 0x800CCC7D when sending email
This error code means you have SSL enabled and your mail server doesn’t support SSL. Disable SSL in Tools, Email Accounts, double click on the account, More Settings, Advanced tab. The error message may say that it’s a Secure Sockets Layer error.

Error 0x800CCC78 when sending
Verify the address you have entered in the From field is correct. Make sure there are no leading or ending spaces or other simple to overlook typos in your address. Verify sending authentication is correct in the Outgoing server tab of the More Settings dialog.

Error 0x80040119 when sending
“0x80040119″ and “Unknown error” error messages when you try to read, send, receive, or delete e-mail in Outlook (814441) Disable the application accessing Outlook’s data and restart Outlook. You may need to reboot the computer before Outlook will send.

Error 0x80042108 when receiving messages.
There are a couple of causes for this error. You may have SSL enabled and don’t need it or you are running Norton Personal Firewall 2002 or Norton Internet Security software.

Error 0x8004010F when attempting to send and receive
This error is either the result of a corrupt delivery folder setting (POP3, message says Outlook data file cannot be accessed) or a missing or corrupt offline address book (Exchange server mailbox).

More Information

Written by

Diane Poremsky
A Microsoft Outlook Most Valuable Professional (MVP) since 1999, Diane is the author of several books, including Outlook 2013 Absolute Beginners Book. She also created video training CDs and online training classes for Microsoft Outlook. You can find her helping people online in Outlook Forums as well as in the Microsoft Answers and TechNet forums.

Please post long or more complicated questions at Outlookforums.

131 responses to “Common Outlook Outgoing Server (SMTP) Errors”

  1. Lisa Harris

    I'm getting an STMP error and a popgmail error message. I'm not able to send emails from this account.


  2. Lisa Harris

    My email still won't go through

  3. iLucato

    Regarding the error Error 0x800CCC0F it is driving me crazy! I did thousand tries and the issue remains. I have one computer where it works and other a new one, it was working and now it stopped. All account settings/ports are correct. Here are the tries with no positive results (didn't fix):

    1. Uninstalled M.Office 2010 and installed over;

    2. Removed Norton 360v5 and desactivated all Windows firewall;

    3. Removed the old Outlook profile and create a new one (From control panel) andset all accounts over;

    4. Tried another PST that is working in another machine with the same server account;

    What esle I would try?

  4. how to set up outloo

    i keep getting the error code 0x800ccc14 whenever i open my OE. what is this error and how can i get rid of it?this is linked to my gmail account

    1. Diane Poremsky

      Does it give a reason with the code? What antivirus do you use?

  5. Dave Jakielo

    how do I fix error 0x80042109

  6. Lukasz b

    Don't answer these idiots Diane, that's what happens when you blog you will get ppl trying to ask for a quick fix without doing so much as giving u an error code or searching for the error code. They should pay someone to give em the quick answer with a magic wand.

  7. Kevin Elliott

    Your message did not reach some or all of the intended recipients.

    Subject: RE: Info for Carl Schultz

    Sent: 1/23/2012 11:13 AM

    The following recipient(s) cannot be reached:

    'carl schultz' on 1/23/2012 11:13 AM

    552 sid:R6Ci1i0063YFRl601:Message rejected for spam or virus content

    I get the above error on every 3rd or 4th try in my outlook sending. I try 2 or three times and it goes through. the recipient seems to get it each time? if i use web mail I have no issues at all so I am assuming it must be between outlook and our web host, they claim it is an outlook issue.

    Any ideas?

  8. Janice Lee

    My emails still stay in Outbox.
    I have tested account settings, and there was no error message.
    But, when I try to send an email, it doesn't leave the outbox.
    Please help!



  10. ME

    I can't get my email to go out!
    The IT guys fixed it yesterday, and I am stuck again!

  11. me

    Everytime I try to send out an email, I get a pop window asking for a Password.
    I never had one!

  12. Chris Stone

    Hi I keep getting the following error message, which I have never had before after using this set up for a few years. the only difference is that I am using a new wireless connection to an australian ISPin a vacation rental home.

    Task ' - Sending' reported error (0x800CCC0F) : 'The connection to the server was interrupted. If this problem continues, contact your server administrator or Internet service provider (ISP).'

    I have tried rebooting my laptop, I have tried switching off my antivirus (Symantec endpoint Protection) and it has made no difference. Any help would be hugely appreciated.

    chris Stone

  13. Benson

    error (0x80042109)

  14. sam

    I have configure three mail acc in outlook two mail accs are working perfectly but one email acc received mails but while sending its gives unknown error..Could any one help me please

  15. Rebecca

    I can't send mail,I keep getting error code 3259
    Please help

  16. zs

    my email goes to outbox. what should i do? i keep getting error code (0x800CCC0D)
    Please help

  17. mgillham69

    Hi Diane, I am hoping you can help. We are operating on Windows 365 with our email through Outlook 2010. Everything works fine till around this time of day 4pm ish and for the last week we can't send or receive anything in the afternoons, mornings are fine. We are using two separate computers and getting the following error codes:

    Laptop computer
    Send 0x800CCC
    Receive 0x80042108
    Send 0x80042109

    Desktop computer
    Send 0x8004210B
    Receive 0x8004210A

    We have checked our account settings and everything is as it should be, we have contacted BT and our internet service provider and no one can provide a solution. We are struggling to run our business efficiently with constant loss of email in the afternoons? Can you help with any thoughts on what do to or where to go next to remedy this.

    Any help greatly appreciated.


  18. mgillham69

    Hi Diane, thanks for your prompt help. I can answer two of your questions:

    It does not work if you re-boot on either the laptop or the PC. Both of us can use web mail but just not via Outlook.

    We are both in safe mode this morning, but won't know if that makes a difference until this afternoon when it crashes again, will come back to you on that later today, but have answered your other two points, not sure if this helps in getting us any nearer to a solution?

    Thanks again for your swift reply.

  19. Michelle Cavanagh

    Hi everything was going ok and now it's happening again to both of us and we are in SAFE mode. We are using our BT Webmail which has recently been upgraded to something called Office 365 and is compatible with our Outlook and we have checked all the settings with BT and everything is as it should be - but our business is now suffering because of this - not exchange I don't think ???? Can you offer any further advice?

  20. Lester

    Hello, after Hotmail switched me over to Outlook I cannot send email from sbcglobal account that I was using with Outlook 2007. Please help.

  21. Lester

    I get the standard 0x80042109 message, I use It was working fine before Hotmail switched over to Outlook.

  22. Lester

    Hi Diane, I did exactly that, changed port to 465, SSL, and enabled authentication on outgoing server (option: use same settings as my incoming mail server), saved it and got this error message: The server you are connected to is using a security certificate that cannot be verified. The target principal name is incorrect.

  23. Lester

    It did, but I was clicking 'no' since I did not know the impact. After reading your note I tested once more and clicked 'yes' and it worked! Great! Is there a way to get rid of this question?

  24. Lester

    No problem. Thank you very much for your help!!!!!

  25. Midas Commodity (@MidasCommodity)

    hi Diane Poremsky
    i have been through your posts and replies and found it quite convincing.
    hope you could help me with my prob. with outlook too.

    i have outlook 2007 installed on my server 2003,
    i have a prob. related SMTP, when i send an email it shows as undeliverable from system administrator, though when i checked with my clients they are already getting mails i send from outlook...

    i have tried almost every thing i could but cant get this prob. solved out.

    would be thankful to you if get any solutions from your side...

  26. Midas Commodity (@MidasCommodity)

    yes i have checkd with them they are gettin msg.

    but then i gt this rply in my outlook inbox (only in outlook inbox) saying :
    From : System Administrator
    Your message did not reach some or all of the intended recipients.

    Subject: *****
    Sent: (time & date)

    The following recipient(s) cannot be reached:

    '' on (time & date)

    None of your e-mail accounts could send to this recipient.

  27. Midas Commodity (@MidasCommodity)

    quick heal
    i even disable my antivirus but din worked

    though i tried it in safe mode today i din got anything in my outlook inbox yet

    but got conf. mail saying "delivered" in my gmail inbox -only for one recipient -which i get everyday

    but nothing for others

  28. Midas Commodity (@MidasCommodity)

    well i dont particularly save items to any particular folder so it must b saved in Outlook's local folders

    also m quite new to outlook 2007

    so I've configured it as per the steps shown in gmail.i guess its POP3 acc.

  29. Midas Commodity

    i have checked its POP Acc.

    shld i try imap settings for the same ?????????

  30. Rob

    Hi Diane
    We have a problem in Outlook 2003 where the outgoing server (SMTP) port keeps getting changed from 465 (which we want) to 25 (presumably some sort of default). What might be changing this and is there anything we can do to stop it? We're using Security Essentials for security

  31. Rob Wallace

    You advice for ver 14 does not work because MS changed the dashboard.

    How can I change the server settings in Mac

    Much appreciated -- thee is very little info on the net about this issue with this version.

  32. Thomas

    Hi Diane. I keep getting a error code of 0x800ccc0e.
    Im using outlook express 6 with live mail from hotmail.
    Ive tried various fixes with no results, i can recieve but cant send..!
    Please help...

  33. thomas

    I have outlook express with Apple MACBOOK and all of a sudden get an error message when I try to delete emails that I have read or no longer need.
    The destination mailbox “(null)” does not allow messages to be moved to it.

    Thanks Thomas

  34. Bobby

    Send test e-mail message: Your outgoing (SMTP) e-mail server has reported an internal error. If you continue to receive this message, contact your server administrator or Internet service provider (ISP). The server responded: 554 Your access to this mail system has been rejected

    The above is coming back when I try to send. Please help.

  35. Sheleiumn Nightingale

    Hi Diane!
    We have 40-50 users all using outlook. All in-house users are able to connect without errors using a simple outlook setup. However we have just hired a sales rep in France and she is having problems sending email through outlook. She is able to receive mail. Also,she is able to use the web app to both send and receive so it must be the setup of outlook. We have tried the default setup along with several iterations of SMTP ports (25,587,8025,465). No matter what port is used the same error occurs:

    The task "sending from" gave the error: 0x80042109
    Failed to send the message: outlook cannot connect to the Outgoing server (SMTP). If this message appears again, please contact server administrator or Internet access provider.

    Is there something additional that needs to happen because it is outside the US? Different ports?

  36. Isabelle

    I also tried to link my outlook 365 to windows live mail essentiels. However I can only receive and not send. I get the error: 0x800ccc0e These are the steps I took:
    1. incoming mail: IMAP
    2. Server name:
    3. Port: 993
    4. Ticked the box: Encryption method: SSL
    5. outgoing mail: SMPT
    6. server name:
    7. port: 587
    4. Didn't tick the box Encryption method: SSL This because outlook gave the following ecryption method: TLSCould you explain me what I do wrong? Thank you!

  37. Amit Goyal

    Hello mam... i have my yahoomail configured to outlook express 7 and suddenly since last 2 days i m unable to connect to the mail server and get the following error message:

    Receiving' reported error (0x800CCC0F) : 'The connection to the server was interrupted. If this problem continues, contact your server administrator or Internet service provider (ISP). The server responded: -ERR Can not connect to e-mail server. Error:100502 '

    I tried to configure another mail at gmail server and found it was working, but when i try any new mail at yahoo mail server it shows the error that cannot connect to e-mail server.

    Please guide what should I do....

    Thanks a lot in advance


  38. Harsh

    my yahoo account is still down for outlook with error code 100502. How to fix it.

  39. Ash

    I too have been unable to work with Outlook since around 8th Dec "13 (over 240 hours now) with exact same error message as cited by Amit Goyal. He uses Express while I use Outlook - this is where the difference ends. I have a POP3 setup with Yahoo.
    Wonder if setting up a new profile would help at all, whether this is a workaround, whether we would need to return to the old profile if it worked.
    I rely on the outlook's capability of offline PSTs immensely.
    I am living by managing it online on YahooMail; with no offline archival in PSTs.

  40. Tom Beiter

    I use sbcglobal who use Yahoo's servers. We received a notice that the server names were changing ( and and the ports were changing to 995/465. I made all the changes, but have been having trouble regardless since. My Windows 8 desktop will pick up once if I delete and re-add the sbc account. Then it gets a message that it can't sync. If I delete and re-add again, I'll get the latest emails, but then that's it again. I've had issues with my android phone and Nexus device as well, but those finally started working. Not sure if it's just a matter of the operating systems getting the latest updates for creating the accounts through the wizard. Everything appears to be setup correctly in the account settings and if it works once on the initial create, I would think that would be enough. Any ideas?

  41. Bob

    Hi. Early December, I had the same issue as a number of users above, and finally found out I had to change the port setting to 995. It worked fine until yesterday at midnight. Then again, outlook doesn't seem to be able to connect to yahoo mail again. (I know it changed at 0.00 because outlook downloaded a mail just a bit before, and could not access the server a bit after midnight, so it seems something changed when we went from Jan 3rd to Jan 4th). Any clue? And why isn't yahoo just giving these information about changes in a transparent way????

  42. Peter Sullivan

    Well thanks for the Outlook smtp error checking guidelines , I had the same issue, and finally found out I had to change the port setting can be helpful. I have also considering your demonstration too. Please update with some new error and solution.

  43. Wameed Abbas

    Hello everyone, i have this error whenever I press the button send & receive mail messages it generates "" server isn't available. contact your administrator "", besides the status of my Outlook 2007 is disconnected. Yet every time i ping the Exchange server it replays perfectly no losses. I have this McAfee Antivirus 2008, it has never bugged me. Some computers send & receive and others get the same problem i explained above. I don't use internet connection, this company uses dead line connection with main branch.
    I tried different solutions, yet nothing worked.
    Could someone plz tell me what to do?

  44. Anthony

    Thank you so much for your knowledge Diane. Error Number: 0x800CCC0F was driving me around the twist till I found your advice in pausing the anti-virus. Thank you

  45. Lance

    Thought I'd share my experience recently but mind you we all have different configurations for use. I'm running a typical Windows 7 system and MS Office products and Eset Securities 7:

    Technical Issue: Outlook 2010 (Resolved) Port 993 unable to sync to incoming server on AT&T Network using iCloud or Gmail. Eset?

    All my emails in Outlook 2010 is unable to receive emails? Error: Unable to connect to incoming server in IMAP Configuration.

    After banging my head for hours yesterday on this topic and calling iCloud support, AT&T, ran ping/tracert tests, uninstalling/reinstalling it boiled down to a simple thing. If your running Eset Securities or any sort of firewall/anti-virus software check if your IMAP scanner is enable. Disabled it and re-test outlook.

    For Eset Security Users on your control panel:

    Setup>Enter advance setup>Web and Email>IMAP, IMAPS>Deselected (turned off) "Enable IMAP checking"

    1. Michelle

      Lance, you are my hero! Thank you for taking the time to share your experience.

  46. Andrea S.

    I have no problems with the SMTP settings even on Outlook 2003...

  47. MoRo

    If you can't send mail, go into preferences, Outgoing Mail Server, use Port 587 - often the others are blocked. Then save and exit mail and then restart mail.

  48. margaret

    Hi Dianne I started getting the error code 800 42109 Outlook cannot connect to you outgoing SMTP server. It is Outlook 2010 and when I log in it has a pop account. This happened suddenly. Do I need to add my email account again?

  49. Margaret

    By the way its a Hotmail account

  50. Melissa

    I recently installed a new modem from timewarner. My husbands Outlook (2003) worked sending and receiving, but two days later he got an error message for receiving email and continues to get the same message. "Cannot find server. Check your internet connection and server name". The internet was connected, the server addresses were was they are suppose to be for gmail. Alot of the blogs seem to talk about this same problem with little resolve. He an send, but not receive all of a sudden, but yet he can bring the computer to work or Starbuck, McDonalds and it sends/receives fine. So one tends to think it is the new router (at least he does) and Timewarner will take no responsibility. So I am looking for some other insight as he seldom works at home and needs to have this resolved.

  51. Muhammed yazir

    hello i am using live mail. we have 22 users the problem is our mail sending error. when i configured mail settings that time it will work after 2 days its not working plz help mee..coming sendin error massege

  52. Rebecca Nored

    Outlook 2010 able to receive but not send....HELO error 501 5.5.2 Command rejected invalid name. Thunderbird works fine. I have chkd server req chg.

  53. Margaret

    Do you mean iCloud? Sorry I'm not too good in this area.

  54. Crown Guild

    Hi Diane,

    Can you help me?

    this is the error message by outlook (2007)

    Task ' - Sending' reported error (0x80042109) : 'Outlook cannot connect to your outgoing (SMTP) e-mail server. If you continue to receive this message, contact your server administrator or Internet service provider (ISP).'

    Thank you/

  55. margaret

    Hi Dianne add-ins are:
    M/s Exchange
    Outlook Social Connector
    Outlook Share Point Server Colleague
    One-Note About Outlook Items
    Outlook Change Notifier

  56. Manny

    Thanks, problem solved!

  57. Margaret

    Hi Dianne thanks again for your help. I sent a test email in safe mode. Still not working. Still saying contact system administrator etc.

  58. Margaret

    I did manage to close Outlook in Safe Mode though. I will try to run scan pst now.

  59. ellecid

    Dianne, The support you are providing here is amazing and appreciated. Just wanted to mention that I kept getting Error Number: 0x800CCC0F trying to pop Yahoo mail to Outlook, until I created a sign in seal with yahoo, and set up an app specific password. Once I did this, Yahoo mail worked in Outlook 2013. Thanks for this posting and all the comments and responses, which helped me to finally figure this out.

  60. margaret

    Hi Diane I have just now sent an email and it worked!
    Thank you so very much for your assistance and patience with me.

  61. Alan Bowser

    Hi Diane. Thank you in advance for reading this! I'm using Outlook 2003. When I send an email to a, e.g., the message ends up in the "sent" folder as '' with the single apostrophe added. As far as I can tell, the mail is never sent. I have been able to send messages to individuals from outlook, but postings to the yahoo groups is a problem. I have check my settings with a comcast representative, and all are fine. It's the yahoogroups or outlook that is a problem. Have you encountered this in your work? Have a suggestion. I know I should to replace 2003, operating on Windows XP. Thanks for the consideration.

  62. Walter McGrath

    Why does Outlook have to "check with the server" before allowing me to do the most mundane things that have nothing to do with the server?

  63. geecoul

    Hi Diane, PLEASE can you help me? Im trying to send messages from Outlook 2011 Mac from my laptop. For the last 5 days i keep receiving the error message '-17099 User has exceeded there send quota'. However, i can still send email from this account either from my iphone, or when i log in to the web based email hosted by godaddy.
    Any ideas as to what I can do to fix it?

    Many, many thanks!

  64. Cecilia Fox

    godaddy email. ATT DSL. outlook express or live mail on a different computer or android tablet mail - no outgoing on 1 of 2 email accounts. since March 2013. both set up exactly the same way w outgoing port 3535. have tried all the alternate ports. ATT DSL no help. I am so sure ATT is blocking. have read about unprovisioning and reprovisioning by ATT in other blogs. know anything about that?

  65. Mark Goodall

    Dear Diane

    I am going bonkers with a problem sending from Outlook 2002, I keep getting
    - Sending and Receiving' reported error (0x800CCC0F) : 'The connection to the server was interrupted. If this problem continues, contact your server administrator or Internet service provider (ISP).'

    I have just re-installed Windows XP Professional due to a disc error, so my machine is almost vanilla. I have no anti-virus software active or anything very much. My outlook was working perfectly before the disc error.

    I installed Outlook 2002 as part of Office professional.

    I have configured the email account as per

    which is the same as

    which I have done before.

    I have tried removing the tick on outgoing server authentication and there was still no joy.

    When I test the account settings everything works and it sends and receives a test email.

    But I just cannot send email using compose and "send", it simply sits in my outbox.

    I did reinstall Windows XP pro a year or so ago and recall that getting Outlook to send email was problematic but I managed to do it, but I am not having any luck this time.

  66. Muhammad Mudassar Umar

    Solution of Outlook Error in MS Outlook 2007 and 2013

    "Send test e-mail message: Cannot send the message. Verify the e-mail address in your account properties. The server responded: 530 5.7.1 Authentication required"

    1- go to the outlook tools menu
    2- Account settings
    3- Double Click on email profile
    4- Go to more settings
    5- Outgoing server and click on "My outgoing server requires authentication"
    6- Click log on using
    7- Enter your full email address and password in respective field.
    8- check the field "remember the password " then click ok and complete the setup

    Note: "You can Configure your Yahoo ID"


  67. siva

    outgoing mails are not being received by recipient

  68. siva

    iam using window live mail

  69. siva

    i have been trying since 3 days, have found no solution

  70. ajoleary

    Hi Diane, I have been using Outlook 2010 to download my Godaddy email (with my work domain) for a year and a half. I work at home and use Comcast as my ISP. It's been working fine the whole time and today suddenly I am unable to send any emails from that account. Nothing has changed. (I have 3 other accounts downloading to my Outlook, including one from the same work domain, and they are all working fine.) When I send an email from my main work account, it bounces immediately; sample email below. It doesn't say WHO the bounce email is from. Godaddy claims it's not on their end - I can use the account fine from the web interface. When I was on the phone with Godaddy support, I was able to send an email to them and it didn't bounce - that's the only one I've been able to send all afternoon (hmmmmmmmmmmm). Comcast says it's not them. I tried disabling Norton and it didn't make any difference. I tried running Outlook in Safe mode - didn't make a difference. My port is 465 with SSL (I tried every combination I could find but none of them would pass the testing). I have my email set to pop and my outgoing server is (Godaddy's server - it never did work with Comcast's outgoing server.) Help!!!

    "Your message did not reach some or all of the intended recipients.
    Subject: test9
    Sent: 11/7/2014 4:35 PM
    The following recipient(s) cannot be reached:

    on 11/7/2014 4:36 PM
    552 ClbZ1p0022aqc2F01 :: auth :: Message rejected for spam or virus content :: Please include this entire message when contacting support :: v=2.1 cv=XMC+SGRE c=1 sm=1 tr=0 p=4Wd1QkmEAAAA:8 a=yMe5U8mYZ1ZQPdExe5eung==:117 a=yMe5U8mYZ1ZQPdExe5eung==:17 a=TZb1taSUAAAA:8 a=DAwyPP_o2Byb1YXLmDAA:9 a=Zr7miEi8wWIA:10 a=cKsnjEOsciEA:10 a=SA5XvbQrKVaDPnDq4X0A:9 a=CjuIK1q_8ugA:10 a=yeqliAB5H2EA:10 a=yI1ukJ7LWKUA:10 a=EtrMh6MZNlsA:10 a=DClJQcuk1j4A:10 a=_dWNx--gS4MA:10 a=yMhMjlubAAAA:8 a=SSmOFEACAAAA:8 a=mD_sLXY8jm5j7n39TQwA:9 a=xAGaEkaPLX6GiohW:21 a=gKO2Hq4RSVkA:10 a=UiCQ7L4-1S4A:10 a=hTZeC7Yk6K0A:10 a=frz4AuCg-hUA:10 :: 100.00"

  71. ajoleary

    Thanks so much! Great to know - perhaps someone should inform godaddy, Comcast, and Microsoft. Oh, never mind. :)

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