On Fri Mar 11 2016 12:21:07 Noel Jones  <njo...@megan.vbhcs.org> said:
> 
> This problem (postscreen delays legit mail server) is nicely solved
> by using a dns whitelist such as dnswl.org to bypass postscreen
> tests for known mail servers... not necessarily "known good"
> servers, just known to not be a bot.  Then your smtpd and content
> filtering can decide if you want the mail.

$ postconf -nf postscreen_dnsbl_sites
postscreen_dnsbl_sites = dul.dnsbl.sorbs.net*1
    zen.spamhaus.org=127.0.0.[10..11]*4 zen.spamhaus.org=127.0.0.[4..7]*6
    zen.spamhaus.org=127.0.0.3*6 zen.spamhaus.org=127.0.0.2*6
    spam.dnsbl.sorbs.net*2 multi.surbl.org*2 dnsbl-1.uceprotect.net
    dnsbl-2.uceprotect.net list.dnswl.org=127.0.[0..255].0*-3
    list.dnswl.org=127.0.[0..255].1*-4 list.dnswl.org=127.0.[0..255].[2..255]*-6
    dwl.spamhaus.org=127.0.2.[2;3]*-3 swl.spamhaus.org=127.0.2.[12;13]*-3

I think yahoo maybe was only looking at the primary DNS which had gone offline 
because of the fixed IP issue, and no one else seemed to notice since the other 
DNS servers were working fine.

-- 
Ahahahahaha! Ahahahaha! Aahahaha!  BEWARE!!!!!  Yrs sincerely  The Opera
Ghost

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