On 4/17/2023 1:38 PM, Tyler Montney via Postfix-users wrote:
I use a mail provider (Provider A) which has thousands of organizations. This provider allows unauthenticated SMTP to other organizations so long as they're using them as a provider (within their ecosystem). Of course, you cannot send unauthenticated email to other providers. I have tried one of my other larger providers, Provider B, and I was unable to do this successfully. Provider A claims this behavior is by design, as some devices have simple or no authentication capabilities. Provider B has similar allowances but all of their methods require a form of authentication.
I'm probably missing something... If they're willing to accept (unauthenticated) general internet mail from any well-behaved server to their customer, what does it matter if it's from another customer?
Sure, most providers require authentication to send any mail, but I don't see where this is a problem.
-- Noel Jones _______________________________________________ Postfix-users mailing list -- postfix-users@postfix.org To unsubscribe send an email to postfix-users-le...@postfix.org
