Do You Want to Send This Message Without a Subject?

Last reviewed on December 30, 2013

Applies to Microsoft Outlook 2013 and Outlook 2010

The "No Subject" warning message is a feature new to Outlook as of Outlook 2010. It was a frequently requested feature in previous versions. When you compose a message and click Send without first filling in the subject field, the following dialog will come up, confirming that you want to send the message with a blank subject field.

Do you want to send this message without a subject alert

Outlook 2010 / 2013 does not currently offer an option to disable this prompt. It is possible to use VBA to disable it (see Links below) however I don’t recommend it.

To add a warning in Outlook 2007, Outlook 2003, or earlier, see Macro to Warn Before Sending a Message with a Blank Subject

While not using a subject might increase the spam score a little, this warning was not added as an anti-spam measure. Some people do filter on a blank subject field, figuring any message without a subject is spam, but a subject is no guarantee the message is not spam.

This warning dialog was added because many users requested it.

It's good netiquette to include a subject, even if its just FYI as many people are annoyed when they receive messages without subjects.

Why do recipients want a subject? Because a subject helps them decide whether to read the message now or later. A subject also makes it easier to find messages when looking for a specific message. For example, if I need to find a message from Mary, I search for all messages from Mary. Because she uses subjects which generally reflect the content of the message, I can easily find the message I need just by viewing the list of messages. On the other hand, Jim rarely enters a subject so I need to look at each one of his messages until I find the one I'm looking for.

In Outlook 2010 or Outlook 2013 against Exchange 2007 or Exchange 2003, with the Conversation view enabled, a subject will help messages create their own conversation as all of the no subject messages will group together as one conversation.

More Information

Disable Outlook 2010 no-subject warning VBA solution by Peter Marchert

Please note: This feature is not at all related to MailTips. Users on some forums recommend changing MailTips settings to disable the No Subject warning dialog – this will not disable the No subject prompt, plus MailTips is an Exchange 2010 feature.

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.

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