On 03/20/2018 03:47 PM, Rick Stevens wrote:
I really rather doubt MTU is what this is about. I think what he was
really asking is 'what is "MTA"' (an email-related thing). In that
it's the Mail Transport Agent (software that moves mail between hosts
using the SMTP protocol). The most common ones you see on Linux are
"sendmail" and "postfix".
If you look further up the thread past what was quoted, Tim mentioned
that it might be an MTU problem.