Issue Patch qmail to handle large MX queries

[SouthO]

Obviously we will probably seeing more of this going forward.

I'm getting deffered deliveries due to the limitations described here http://www.lifewithqmail.org/lwq.html#dns-problem

The message logged is
deferral: CNAME_lookup_failed_temporarily._(#4.4.3)/

Seems simple enough as detailed at http://www.lifewithqmail.org/lwq.html#dns-patches
"To do this, just replace PACKETSZ with 65536 in dns.c and rebuild qmail."

 

[IgorG]

You can try to use this instruction https://kb.plesk.com/en/1161
Or just switch to Postfix MTA.