[Dovecot] Using Dovecot-auth to return error code 450 (or other 4xx) to Postfix when user is on vacation

[Mark Sapiro]

IVO GELOV (CRM) wrote:

> I still think that my idea with custom error codes is more useful - if the user is
> on vacation, the message is rejected immediately (no auto-reply is sent) and sender
> can see (hopefully, because most users just ignore error messages) the reason why
> the messages was rejected.


A 4xx status will not do this. It should just cause the sending MTA to
keep the message queued and keep retrying. Depending on the sending
MTA's retry and notification policies, the sender may see no error or
delay notification for several days.

If you really want the sender to immediately see a rejection, you have
to use a 5xx status.

-- 
Mark Sapiro <mark at msapiro.net>        The highway is for gamblers,
San Francisco Bay Area, California    better use your sense - B. Dylan