On 6/12/2017 9:59 AM, flor...@coppint.com wrote:
> Hi,
>
> On 2017-06-08 17:58, Noel Jones wrote:
>> On 6/8/2017 8:53 AM, flor...@coppint.com wrote:
>>> Hi everyone,
>>>
>>> I run some mass-mailing servers with Postfix 2.11.3.
>>>
>>> I have some messages being deferred because of malformed addresses
>>> like "john....@gmail.co" ("gmail.co" instead of "gmail.com").
>>
>> gmail.co exists, but does not answer on port 25. Postfix correctly
>> treats this as a temporary error and will return the mail to sender
>> after $maximal_queue_lifetime. From postfix's point of view, this
>> is indistinguishable from a domain that is temporarily offline.
>
> That's the point, sender never gets notified about non-delivery.
>
> I checked my config and see that I never had
> "reject_unknown_recipient_domain" in my restrictions. Could it be
> the cause ?
>
> I added it and will see what's going on after 5 days of queuing.
Using reject_unknown_recipient_domain will have no effect on domains
that exist but don't accept mail, such as "gmail.co".
Postfix will return undeliverable mail to the envelope sender
address. The envelope sender is not necessarily the same as the
From: header. The envelope sender is recorded in the postfix log.
If the mail is not returned as expected, check the postfix logs.
Postfix goes to great effort to always record what happens to mail.
-- Noel Jones
