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Hello list

I currently have a weird problem with my postfix installation. Emails
to the domain ogrj.ch cannot be sent anymore. Postfix claims that no
MX host for said domain has a valid address record.
A dns query for the MX of this domain tells me that the following
hosts act as MX

ogrj.ch.                3057    IN      MX      10 smtasg01.abxsec.com.
ogrj.ch.                3057    IN      MX      20 smtazh01.abxsec.com.
ogrj.ch.                3057    IN      MX      110 smta2.abxsec.com.
ogrj.ch.                3057    IN      MX      120 smtp1.seabix.com.
ogrj.ch.                3057    IN      MX      130 smta4.abxsec.com.
ogrj.ch.                3057    IN      MX      140 smta3.abxsec.com.
ogrj.ch.                3057    IN      MX      510 mtas.abxsec.com.
ogrj.ch.                3057    IN      MX      520 mtaz.abxsec.com.

In the postfix logs I get the following:

Jun 11 11:09:07 smtp2 postfix/smtp[19862]: warning: no MX host for
ogrj.ch has a valid address record
Jun 11 11:09:07 smtp2 postfix/smtp[19862]: 2B25317FA69:
to=<removed_for_priv...@ogrj.ch>, relay=none, delay=0.18,
delays=0.15/0/0.03/0, dsn=5.4.4, status=bounced (Host or domain name
not found. Name service error for name=smtp1.seabix.com type=A: Host
not found)

what I do not understand so far is, that postfix seems to try to
connect to smtp1.seabix.com which has prio 120
Why does postfix not try to connect to the 10 or 20 prio hosts?

For other domains which are handled via the same MX we could deliver
without any problem to MX host with prio 10

Jun 11 11:28:23 smtp1 postfix/smtp[6995]: 8127A17F87B:
to=<removed_for_priv...@stadt.sg.ch>,
relay=smtasg01.abxsec.com[193.246.80.88]:25, delay=1.4,
delays=0.04/0/0.12/1.3, dsn=2.0.0, status=sent (250 2.0.0
t5B9SMtO014723 Message accepted for delivery)

The difference between these two domains is that stadt.sg.ch only has
two MX hosts

stadt.sg.ch.            60      IN      MX      20 smtazh01.abxsec.com.
stadt.sg.ch.            60      IN      MX      10 smtasg01.abxsec.com.

Does anyone have a clue where I could dig more to narrow the source of
the problem?

Thanks for any idea
Cheers

tobi
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