My school uses an IMAP email system that I connect to via Outlook. However, they only allow me to use their outgoing mail server when I access my email from within their domain. That server is ...

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 ...

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.