I am currently using SSMTP to send email notifications from my Icinga server. I am using my web host's STMP server to send the mail, with working authentication details [ eg firstname.lastname@example.org ]
When a mail is sent by Icinga (or just via SSMTP on the console) the message is delivered as FROM: email@example.com [ eg firstname.lastname@example.org ] At first, I wanted to change this, but have decided it doesn't really matter (it is just me who receives the messages, and my address is on the same domain name), barring spam problems. I am worried that somehow my domain name will be marked as spam for false addressing (or something like that).
So it brings me to the question: Will the difference in username (between sent and the AuthUser) have any impact whatsoever on spam?
If not, will there be a change of answer if I start delivering to other addresses [ eg gmail ]?