When you use POP3 or IMAP accounts and if you your email host allows it, you can send mail from another email address by typing it in the From field.
A common question is how to send a message only to meeting invitees who have no yet responded to the meeting request. While Outlook doesn't include this feature, you can easily do this using VBA.
Use this macro to send an attachment to email addresses in the To line and CC others with just the message and a list of attachments, and the To: recipients.
Use VBA to check the subject of every message you send (new or replies) for a specific keyword. If the word is not found, add it to the subject.
Macro samples to send messages from a specific email account or email address you have permission to send as.
If you're accidentally sending messages using other keys there are a couple of other workarounds you can use to stop the message from being sent. One method you can is to type random characters in the CC field so the "address" won't resolve. This stops the send and brings up the Check names dialog, which
Most of the questions I get about using Ctrl+Enter to send email are about how to turn the feature off, as many people don't like it and accidentally hit it, a user wanted to know how to show the warning dialog after telling Outlook not to show it: I turned off (permanently) the ctrl-enter to