Ubuntu
libspf2 package

  1. Bug #1328277
  2. Comment #1

Comment 1 for bug 1328277

Revision history for this message
Scott Kitterman (kitterman) wrote : Re: [Bug 1328277] [NEW] spfquery times out checking apparently valid record

I think it's likely related to the TCP fallback/retry. That record is right
on the edge of if it will fit in a UDP packet or not and so it'll probably
work some times and not others. The SPF RFCs recommend against records that
large for this exact reason.

When you checked, was it from the same host you're having trouble with
spfquery on? If not, it might also be because DNS over TCP was blocked for
the host running spfquery.

If you install spf-tools-python, it includes an alternate spfquery
implementation that I know supports TCP fallback, as long as TCP isn't blocked
in a firewall somewhere.