On Thursday 20 May 2004 01:16, Asa Rossoff wrote: > Derek Jennings <[EMAIL PROTECTED]> said: > > Your trouble with upstream SMTP servers rejecting your mail may be > > because thet are doing a reverse DNS lookup as an anti spam measure. > > They look at the domain name in your headers, "scoop.local" and do a > > reverse > > > DNS lookup to see if it matches the IP address you are attached to. If > > they > > > are non consistent your mail is rejected. > > > > You can get around the problem by forwarding your mail via tiscali. The > > tiscali SMTP server knows you are connected to one of its own ISDN lines > > and > > > will accept any mail from you. > > > > In your /etc/postfix/main.cf add the line > > > > relayhost = smtp.tiscali.fr (or whatever it is) > > I've heard this rumor before, but I have never had any problems with mail > delivery direct to various smtp servers as long as I had a fully-qualified > domain name on my machine. I am not aware of isp's that validate by > reverse-lookup before accepting a connection, only of many isp's that check > that your machine id's itself with a fully-qualified internet domain name. > > I could be wrong, since I don't handle huge volumes of mail, just personal > correspondence, but in that, I have had no problems. > > Asa
If you want to enable this feature in your own Postfix server use :- smtpd_helo_restrictions = reject_unknown_hostname http://www.postfix.org/SMTPD_ACCESS_README.html#lists derek -- www.jennings.homelinux.net http://twiki.mdklinuxfaq.org
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