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.

How to Restore Mail to the Mail Server
How to restore POP3 mail to the server when Outlook is configured to "delete mail from server" by default.

New Message Indicator for Subfolders?
Replace Outlook rules that file all messages on arrival, and deeply nested folders with Search Folders and Quick Steps to keep Outlook organized and find the messages when you need them.
Control Link Formatting in Email Signatures
A user asked: "I have my email address in my Outlook signature without a link and blue underline. When I compose email, it looks fine. However, the recipients get a link with a blue underline. How do I control this? " As long as you use HTML message format, you can control the link color

Stopping users from opening links in email
While administrator can't prevent users from clicking on links, they can take advantage of a fairly common problem to make the links unclickable. This won't stop clever users from copying the links and pasting them into the browser but it will slow them down.
Customize New Mail Alerts
An Outlook user wanted to know if it's possible to customize new message alerts for different accounts: Is it possible to set custom alerts for new mail that comes in to different accounts? For example, I’d like to get an audible and desktop alert for new mail in my work account, but no alert for

Open .eml Files in Outlook
Note: Outlook 2007 SP2 and Outlook 2010 can open eml files directly without using this hack. When you receive an .eml attachment in a message and open it, it opens in Outlook Express or Windows Live Mail, not in Outlook. This is normal since eml is not an Outlook file type. However, .eml files are

Outlook downloads mail slow in Windows 8
I'm seeing reports that Outlook installed on Windows 8 is very slow to send and receive. It's fine when the computer is first booted, but after several hours it slows appreciably. The cause: antivirus scanning email. Disabling the outbound scan and any Outlook add-ins installed by the antivirus software will solve the problem. Along with

Opening Outlook attachments in Windows 8
How to select a desktop application to open Outlook attachments when you use Windows 8.

Your IMAP Server Wants to Alert You...
Users report this problem: A box titled "Microsoft Office Outlook" comes up with an error message that there is a problem that the IMAP server. The error message says Your IMAP server wants to alert you to the following: 124 (1032) That mail is not currently available. The number 124 refers to message # 124;

Using "Recent Documents" in Outlook
How to restore the Recent Documents link to Office 2010 and 2013.