Hello everyone,
whenever I submit to my postfix server a mail having a massive (~15k)
recipient list, it takes forever to accept and start delivering it.
I've done everything in the checklist (namely DNS caching), but it seems
like the problem is not related to a DNS issue: tcpdump-ing port 53
while sending such email, does not show the huge traffic I'm expecting.
Has it something to do with address validation (which, if I understood
correctly, is only enabled by reject_unverified_*, absent from my
configuration)?
Is there anything else I can check?
Thank you.
