bounce requeuing for a specific domain

Dave Jones

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May 13, 2014, 10:18:13 AM5/13/14

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I have read the documentation and searched the web without any success.

Is it possible to setup a specific destination domain to not bounce
but always tempfail/requeue?

AOL bounces these back to our senders but I would like for them to
stay in the queue so I can resend them later. If they would tempfail
like Yahoo does, then everything would work out in the end.

May 13 08:50:05 mailserver postfix/smtp[30705]: D16B92C0C4C:
to=<reda...@aol.com>, relay=mailin-02.mx.aol.com[64.12.88.163]:25,
delay=1, delays=0.05/0.01/0.38/0.6, dsn=5.2.1, status=bounced (host
mailin-02.mx.aol.com[64.12.88.163] said: 521 5.2.1 : (CON:B1)
http://postmaster.info.aol.com/errors/554conb1.html (in reply to end
of DATA command))

Robert Schetterer

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May 13, 2014, 10:42:17 AM5/13/14

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Am 13.05.2014 16:18, schrieb Dave Jones:
> I have read the documentation and searched the web without any success.
>
> Is it possible to setup a specific destination domain to not bounce
> but always tempfail/requeue?
>
> AOL bounces these back to our senders but I would like for them to
> stay in the queue so I can resend them later.

you may "hold" mails

If they would tempfail
> like Yahoo does, then everything would work out in the end.

tmpfail means postfix will retry auto, i dont see some "todo" about this
with normal mailing ( perhaps that may differ if you send mass mail )

>
> May 13 08:50:05 mailserver postfix/smtp[30705]: D16B92C0C4C:
> to=<reda...@aol.com>, relay=mailin-02.mx.aol.com[64.12.88.163]:25,
> delay=1, delays=0.05/0.01/0.38/0.6, dsn=5.2.1, status=bounced (host
> mailin-02.mx.aol.com[64.12.88.163] said: 521 5.2.1 : (CON:B1)
> http://postmaster.info.aol.com/errors/554conb1.html (in reply to end
> of DATA command))
>

reda...@aol.com is a special sender address to send info i.e about some
mail i.e from "you" is tagged as spam at aol, you will get theses mails
if you have done some agree with them to watch about spam, but in
general it produces a lot of false positves, why you bounce them back to
aol ?

Best Regards
MfG Robert Schetterer

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Wietse Venema

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May 13, 2014, 10:47:53 AM5/13/14

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Dave Jones:
> I have read the documentation and searched the web without any success.
>
> Is it possible to setup a specific destination domain to not bounce
> but always tempfail/requeue?

You could configure a dedicated SMTP client in master.cf with "-o
soft_bounce=yes", combined with transport_maps to send mail there.

Or, you could use smtp_reply_filter to modify the server reponse.

> mailin-02.mx.aol.com[64.12.88.163] said: 521 5.2.1 : (CON:B1)
> http://postmaster.info.aol.com/errors/554conb1.html (in reply to end
> of DATA command))

CON:B1 means: "The IP address has been blocked due to a spike
in unfavorable e-mail statistics."

Clearly, retrying an unfavorable peak does not help.

Wietse

Dave Jones

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May 13, 2014, 11:00:23 AM5/13/14

to

>Dave Jones:
>> I have read the documentation and searched the web without any success.
>>
>> Is it possible to setup a specific destination domain to not bounce
>> but always tempfail/requeue?

>You could configure a dedicated SMTP client in master.cf with "-o
>soft_bounce=yes", combined with transport_maps to send mail there.

>Or, you could use smtp_reply_filter to modify the server reponse.

Thank you for this information. Postfix is very powerful so I knew it
could be done but sometimes the documentation is difficult to find
if you don't know what keywords to search on for advanced configs.

>> mailin-02.mx.aol.com[64.12.88.163] said: 521 5.2.1 : (CON:B1)
>> http://postmaster.info.aol.com/errors/554conb1.html (in reply to end
>> of DATA command))

>CON:B1 means: "The IP address has been blocked due to a spike
>in unfavorable e-mail statistics."

>Clearly, retrying an unfavorable peak does not help.

I know what the message means since I can follow links and read.

I have some "special processing" that will take care of this problem
and retry delivery but I don't want to give the details on the list.