On 19/07/2021 10:16, Thomas Walter via mailop wrote:


On 19.07.21 10:56, Tim Bray via mailop wrote:
I do this.  For a corporate email system is makes a lot of sense.   I shouldn't be receiving email externally with a From: domain which is local.
As long as your users don't have an external mailbox which gets forwarded to the local one.


It's for work.  And users shouldn't be using any other email account or server for work stuff.  And equally shouldn't be using their work email account for personal stuff.

(and if they log in to their gmail/hotmail/whatever from work computers for personal stuff, that's fine)



In that case a local user can send to that external address and it gets forwarded from an external server to the local domain - with the local domain as From.

And we'd reject it.



There are other cases, but that is one example which happens with a lot of students here.

The difference is that I can tell my employees not to do crazy stuff :)


Jaroslaw Rafa said:

It*may*  make sense for corporate email (if you disregard the forwarding
issue mentioned in the other reply), but definitely*not*  for a general
purpose email service provider.

I totally agree.    And everything is a compromise.


Tim


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