Dnia 17.01.2020 o godz. 04:17:39 Viktor Dukhovni pisze: > > > Instead of "u...@mailserver.domain.com" you type only > > "u...@domain.com" - that's what MX record is for. But > > "u...@mailserver.domain.com" is still perfectly valid and mail to such > > address *has to be* be delivered. > > And here I'm afraid you've gone off the rails, there is no requirement > for example.com to accept email addressed to u...@mxhost.example.com, > whether or not mxhost.example.com is an MX host for the domain. > > It is quite common for the "@example.com" addresses to be the only > externally valid addresses for users in a given domain. Email addresses > tend to linger in mailboxes for years, and it is not generally a good > idea to use or support addresses tied to specific hosts.
You are right, but it's up to the receiving server to decide if it will accept mail to u...@mxhost.example.com or not, and not to the sending one. As long as mxhost.example.com has valid A record, mail should be sent out. Eventually it will bounce. -- Regards, Jaroslaw Rafa r...@rafa.eu.org -- "In a million years, when kids go to school, they're gonna know: once there was a Hushpuppy, and she lived with her daddy in the Bathtub."
