Ubuntu
dkim-milter package

  1. Bug #387171
  2. Comment #2

Comment 2 for bug 387171

Revision history for this message
Simon Déziel (sdeziel) wrote :

I can reproduce this issue too but I doubt that falling back on DNS lookups on UDP only is a good solution. According to this reference http://www.ietf.org/proceedings/42/I-D/draft-ietf-dnsind-udp-size-02.txt the maximum size of a DNS packet in UDP is 512 :
    The Domain Name System defaults to using UDP for queries and replies
    with a DNS payload limit of 512 bytes. Larger replies cause an
    initial truncation indication leading to a subsequent handling via
    TCP with substantially higher overhead.

A lot of DKIM TXT record would not fit in such small packets.