this post was submitted on 17 Jul 2023
2064 points (97.3% liked)
Mastodon
5290 readers
1 users here now
Decentralised and open source social network.
founded 5 years ago
MODERATORS
you are viewing a single comment's thread
view the rest of the comments
view the rest of the comments
Most orgs have an internal SMTP server that will accept and send mail to other internal addresses without any special authentication or validation. It's almost essential for automatic monitoring software and that sort of thing.
Where the barriers go up is at the border to the Internet. And thank goodness, just a couple decades ago it was sheer chaos.
I was on the school network, so maybe they accept ones from within and reject ones from outside.