The Email section at Slipstick covers general email issues in Outlook. Some of the more common problems are linked below.
Usage | Problems & Limitations | Troubleshooting | More Information
Usage
- Add Attachments and Set Email Fields During a Mail Merge
- Adding an Image to a Signature
- Automatically BCC All Messages
- Change the Subject of an Incoming Message
- Changing the Reply format revisited
- Check Message Size Before Sending
- Choosing the Folder to Save a Sent Message In
- Designate the Account Used to Send a Message
- Download Only Messages Smaller than 30kb
- Find All Unread Messages
- To Change the Font on Incoming Messages
- To Change the Look of Outlook Replies
- To Work with Outlook While it's Getting Messages
- Understanding Outlook's Auto-Complete Cache (*.NK2)
- Understanding the Flag for Follow Up Reminder Time
- Using Automatic name checking or Autocomplete
Microsoft Knowledgebase articles
- Send To Mail Recipient Opens an Outlook Plain Text Message
- Add and request read receipts and delivery notifications
Problems & Limitations
- Do You Want to Send This Message Without a Subject?
- Help! Every email I send has two unknown attachments
- Messages are Double Spaced for the Recipient
- Setting Margins when Composing Email
- To Use Internet-Style Quoting
Microsoft Knowledgebase articles
- E-mail messages are not automatically sent or received at startup in Outlook
- "Send Time" time stamp information is incorrect when you send a delayed delivery message in Outlook
Troubleshooting
- Adjusting Outlook's Zoom Setting in Email
- Can't Rename Windows Folder: Folder in Use Error
- Outlook is Sending Winmail.dat Attachments
Microsoft Knowledgebase articles
Addins and Utilities
The following pages contain lists of add-ins and utilities.
Outlook is Automatically Underlining Words
There are two different issues when words are automatically underlined. The one is related to the autocorrect underline feature (equal signs turn into double underlines), the other to Styles and underlined fonts (text is underlined as you type). Equal signs, dashes, or underscores turn into lines The autocorrect underline issue is really a Word problem,

File Sent Messages with the Original Messages
Use Conversation view to view sent messages with the original or save sent messages with the original.
Don't Send Attachments to CC'd Recipients?
Outlook doesn't have native ability to send a message with an attachment and copy the message to others, leaving off the attachment.
Check Message Size Before Sending
"Is there any way I can set up a warning (or possibly limit) on the size of file I can email? I'm guilty of accidentally sending 13mb files." Sure, you can use VBA to warn you. A very basic warning uses this simple code: Private Sub Application_ItemSend(ByVal Item As Object, Cancel As Boolean) If Item.Attachments.Count
Prevent Users From Choosing Stationery
How to restrict the usage of stationery in Outlook. This method can be used to set a default stationery for use by all users on the local network and prevent users from changing the stationery on their desktops.
Outlook Quick Tip: Mail Templates
I have two questions with Outlook. Can I change the default editor from HTML to Word and is there a way to create a mail template so I don't have to retype my name on every email I send? Current versions of Outlook have just one editor available and it's Word, so no, you can't change the

Filing email in folders: Good or Bad?
Is it better to file email by sender or dump everything into one folder?

Insert links to OneDrive Files
How to send links to files stored in OneDrive, Dropbox and other cloud services in Outlook email messages.

Disable Stationery and Fonts using Group Policy
I need to disable the ability of the end-user to modify Stationery and force a default stationery and font. I have found the "font" forcing but not the rest. I was trying to work with control ID but don't know how to find the right ones. You'll need to make at least three changes: 1)

How to Send a Forwarded Draft Email
A surprising number of people run into this problem: "A colleague sends me draft emails as attachments to a message. When I open the attachments to revise the emails before sending, the send button is grayed out. How do I send it?" To send the message, you need to move the attachment to your Drafts