On 2019-02-25 15:56, Wietse Venema wrote:
Stefan Bauer:
Hi,
our outgoing mails sometimes end up undeliverable in postfix queue and
bounce back after 5 days, when remote sites change MX entries and
postfix
has the old informations.
That is incorrect. Postfix does not remember DNS information. The
retry schedule is controlled with:
maximal_backoff_time = 4000s
minimal_backoff_time = 300s
queue_run_delay = 300s
Those are the default settings.
Wuetse
You might want to look for cache DNS along the path, but it seems odd
one of them would keep a data in cache longer than domain's TTL. A
correctly driven DNS change should not lead to this kind of problem.
I've seen DNS mismatch few times due to problems in zone signature. None
otherwise.
patrick
