Sendmail and "Proper Authentication"
cswiger at mac.com
Thu Aug 24 17:18:32 UTC 2006
On Aug 23, 2006, at 8:50 PM, Nicholas Ink wrote:
> The first problem I experienced was that there a host name lookup
> failure for "gmail.com," which I have subsequently corrected by adding
> the line:
> gmail.com smtp:[smtp.gmail.com]
> to /etc/mail/mailertable.
This is wrong; you should be using an IP address inside the domain-
literal form (square brackets).
You should try to fix whatever the problem with your DNS is, instead.
"dig -t mx gmail.com" should return valid results....
> However, there is still a problem, when I
> try to send an e-mail, /var/log/maillog says:
> Aug 23 23:18:08 arches sm-mta: k7O3I7K2001049:
> from=<nink at XXXXXXXX.xxx>, size=397, class=0, nrcpts=1,
> msgid=<44ED1A6F.1090009 at XXXXXXXX.xxx>, proto=ESMTP, daemon=IPv6,
> relay=localhost [IPv6:::1]
> Aug 23 23:18:16 arches sm-mta: STARTTLS=client,
> relay=gmail-smtp.l.google.com., version=TLSv1/SSLv3, verify=FAIL,
> cipher=DES-CBC3-SHA, bits=168/168
> Aug 23 23:18:16 arches sm-mta: k7O3I7K2001049:
> to=<nicholasink at gmail.com>, ctladdr=<nink at XXXXXXXX.xxx> (1007/0),
> delay=00:00:08, xdelay=00:00:08, mailer=smtp, pri=30397,
> relay=gmail-smtp.l.google.com. [18.104.22.168], dsn=5.0.0,
> stat=Service unavailable
> Aug 23 23:18:16 arches sm-mta: k7O3I7K2001049: k7O3IGK2001051:
> DSN: Service unavailable
> where arches is my host name. I can't understand why it continues to
> say "Service unavailable" when I know Gmail is not experiencing any
> downtime or anything else. Is this some sort of spam filter?
Yes, on their side. gmail.com isn't going to relay random email
without you authenticating first, probably; look into configuring
SMTP AUTH on your side, or talk with <postmaster at gmail.com> about
what their requirements are to permit you to relay via their mail
However, normally people configure their machines to relay email via
the SMTP server(s) which your ISP provides, as they are generally
configured to trust their client networks without requiring SMTP AUTH
and thus are easier to use...
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