Could not complete sender verify callout - to exim
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From: Marek Pedziwiatr on 12 Jan 2007 04:11 Hello I use sendmail 8.13-7. I've got a problem to send emails from my server to some smtp servers based on Exim From time to time I can see: "Deferred: 451 Could not complete sender verify callout" in maillog during connection to some servers. I can't find out if it's my sendmail misconfigurtion problem or problem is on other sites. Some times it helps if I add Connect:a.b.c.d OK line in /etc/mail/access , but I don't like this method. Do you have any suggestion how to solve this question ???
From: Andrzej Adam Filip on 12 Jan 2007 05:02 "Marek Pedziwiatr" <NO-SPAM-Marek.Pedziwiatr(a)fso-sa.com.pl> writes: > Hello > I use sendmail 8.13-7. > I've got a problem to send emails from my server to some smtp servers based > on Exim > From time to time I can see: > "Deferred: 451 Could not complete sender verify callout" > in maillog during connection to some servers. > I can't find out if it's my sendmail misconfigurtion problem or problem is > on other sites. > Some times it helps if I add > Connect:a.b.c.d OK > line in /etc/mail/access , but I don't like this method. > Do you have any suggestion how to solve this question ??? Most likely getting "RCPT TO:" reply takes too long due to time it takes too complete DNSBL lookups. Which DNSBL do you use to block spam at your site? [As a rule of thumb I would suggest maximum 3 from non local source] -- [pl2en: Andrew] Andrzej Adam Filip : anfi(a)priv.onet.pl : anfi(a)xl.wp.pl Before You Ask: http://anfi.homeunix.net/sendmail/B4UAsk-Sendmail.html http://anfi.homeunix.net/sendmail/
From: Marek Pedziwiatr on 12 Jan 2007 06:52 > Which DNSBL do you use to block spam at your site? > [As a rule of thumb I would suggest maximum 3 from non local source] > In sendmail I use dnsbl features: FEATURE(`dnsbl', `proxies.blackholes.easynet.nl', `"550 5.7.1 ACCESS DENIED to OPEN PROXY SERVER "$&{client_name}" by easynet.nl DNSBL (http://proxies.blackholes.easynet.nl/errors.html)"', `')dnl FEATURE(`dnsbl', `relays.ordb.org', `"550 Email rejected due to sending server misconfiguration - see http://www.ordb.org/faq/\#why_rejected"')dnl FEATURE(`dnsbl', `bl.spamcop.net', `"450 Mail from " $`'&{client_addr} " refused - see http://spamcop.net/bl.shtml Twoj serwer jest na czarnej liscie SpamCop."') FEATURE(`dnsbl',`sbl.spamhaus.org',`Rejected - see http://spamhaus.org/')dnl FEATURE(masquerade_envelope) FEATURE(`dnsbl') FEATURE(dnsbl,`blackholes.mail-abuse.org',` Mail from $&{client_addr} rejected; see http://mail-abuse.org/cgi-bin/lookup?$& {client_addr}')dnl FEATURE(dnsbl,`relays.mail-abuse.org',` Mail from $&{client_addr} rejected; see http://work-rss.mail-abuse.org/cgi-bin/nph-rss?$& {client_addr}')dnl FEATURE(dnsbl,`dialups.mail-abuse.org',` Mail from dial-up rejected; see http://mail-abuse.org/dul/enduser.htm')dnl FEATURE(`greet_pause',3000)dnl Additionaly I use RBL included in spamassassin + DCC + SPF
From: Alexander Dalloz on 12 Jan 2007 11:35 On Fri, 12 Jan 2007 12:52:46 +0100 Marek Pedziwiatr wrote: > In sendmail I use dnsbl features: > FEATURE(`dnsbl', `proxies.blackholes.easynet.nl', `"550 5.7.1 ACCESS DENIED > to OPEN PROXY SERVER "$&{client_name}" by easynet.nl DNSBL > (http://proxies.blackholes.easynet.nl/errors.html)"', `')dnl > FEATURE(`dnsbl', `relays.ordb.org', `"550 Email rejected due to sending > server misconfiguration - see http://www.ordb.org/faq/\#why_rejected"')dnl ordb.org is DEAD since 18th Dec. 2006. Remove it. Alexander -- Alexander Dalloz | L�hne, Germany | GPG http://pgp.mit.edu 0xB366A773 legal statement: http://www.uni-x.org/legal.html Fedora Core 2 GNU/Linux on Athlon with kernel 2.6.11-1.35_FC2smp Serendipity 17:34:12 up 2:47, 9 users, 0.09, 0.29, 0.44
From: Jørn Dahl-Stamnes on 12 Jan 2007 11:36
Marek Pedziwiatr wrote: > In sendmail I use dnsbl features: > FEATURE(`dnsbl', `proxies.blackholes.easynet.nl', `"550 5.7.1 ACCESS > DENIED to OPEN PROXY SERVER "$&{client_name}" by easynet.nl DNSBL > (http://proxies.blackholes.easynet.nl/errors.html)"', `')dnl proxies.blackholes.easynet.nl: Unknown host > FEATURE(`dnsbl', `relays.ordb.org', `"550 Email rejected due to sending > server misconfiguration - see http://www.ordb.org/faq/\#why_rejected"')dnl relays.ordb.org: Unknown host > FEATURE(`dnsbl', `bl.spamcop.net', `"450 Mail from " $`'&{client_addr} " > refused - see http://spamcop.net/bl.shtml Twoj serwer jest na czarnej > liscie SpamCop."') spamcop.net: OK > FEATURE(`dnsbl',`sbl.spamhaus.org',`Rejected - see > http://spamhaus.org/')dnl FEATURE(masquerade_envelope) spamhaus.org: Unknown host > FEATURE(`dnsbl') > FEATURE(dnsbl,`blackholes.mail-abuse.org',` Mail from $&{client_addr} > rejected; see http://mail-abuse.org/cgi-bin/lookup?$& {client_addr}')dnl mail-abuse.org: Moved > FEATURE(dnsbl,`relays.mail-abuse.org',` Mail from $&{client_addr} > rejected; see http://work-rss.mail-abuse.org/cgi-bin/nph-rss?$& > {client_addr}')dnl work-rss.mail-abuse.org: No reply > FEATURE(dnsbl,`dialups.mail-abuse.org',` Mail from > dial-up rejected; see http://mail-abuse.org/dul/enduser.htm')dnl > FEATURE(`greet_pause',3000)dnl mail-abuse.org: Redirected to www.trendmicro.com -- J�rn Dahl-Stamnes http://www.dahl-stamnes.net/dahls/ |