I'm writing a program that will have to send mail through SMTP. Doing that, I came across a really weid behavior of our exchange 2013 server: If the SMTP session authenticates the session through AUTH ...

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.

I've found myself in a situation where I need send/receive mail to/from a remote network (work). I am able to receive mail just fine (using pops, imaps) on my home desktop (debian testing/unstable ...