The Simple Mail Transport Protocol, or SMTP, is a standard for how computers talk to each other to send email. If you're sending email using Microsoft Outlook, your computer may connect to your ...

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.

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 ...

This list is a companion piece to the Secure Web server installation portion of SearchSecurity.com's Intrusion Defense School lesson on Web attack prevention and defense. Check out the companion ...

I set it with the eximconfig program, and indeed it is in /etc/mailname, but it's still not working properly, and it's causing some mail servers to reject ...

Some Outlook users have reported that they are unable to send email from the app as when doing the same, they receive Error 503 stating that the Valid RCPT command ...