With many types of business email accounts, your computer connects to a machine called the Simple Mail Transfer Protocol server when you send messages. If you have difficulty sending messages, there ...

I work for an ISP and occasionally deal with customers who swear up and down that they need *our* outgoing email server to make email that we do not host or provide work. Example: Customer has ...

It appears many Mail users are having authentication problems in which they are prompted for the username and password every time a message is sent (either manually ...

Users have noted significant issues with ability to send and receive mail, as well as overall sluggish performance from Mail.app 2.0.2 -- the new release included with Mac OS X 10.4.2. Other issues ...