4 ms·

Can you explain what you mean about gmail?

• xyzzy_plugh 5y ago
  Classically SMTP let you "relay" mail that neither originated or is destined for the specific server. Gmail, and most modern SMTP servers, only permit mail from or to a Gmail address/their primary domain. Edit: added clarification that all SMTP servers do not only permit Gmail addresses...
  • labawi 5y ago
    Is this sarcasm? As the gmail part is completely false. Relaying used to be a thing, before spammers and unwillingness to deal with it at the source (boot infected devices, originating AS / IX, .. ) resulted in a choice between a game of whack-a-mole or only accepting gmail¹. These days, relaying has to be setup on the specific relay server, the originating address needs to permit it (DNS SPF/DKIM/DMARC/whatever), and the relay server will still have a reputational problem with deliverability to unrelated servers, which is problematic even for direct mail, unless you are gmail¹. ¹ usually gmail + varying number of big players
    • xyzzy_plugh 5y ago
      Ah I was a little unclear. Edited. I meant that free-for-all relaying is a thing of the past.