Verizon is one of the many Internet Service Providers that require you to authenticate when sending mail. The purpose of SMTP authentication is to reduce email spamming and abusive mailing behaviors.

Yahoo provides the addresses of simple mail transfer protocol (SMTP) servers you can use in the email application on your computer or mobile device. After setting a Yahoo SMTP server as the outgoing ...

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 ...

My Exchange 2010 server has five IP addresses. I've got the second one configured as the mail server, and the SMTP receive connector listens only on that address. However, all outgoing SMTP is using ...

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 ...