| Stephen Gran on 11 Oct 2005 08:22:24 -0000 |
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On Mon, Oct 10, 2005 at 08:18:13PM -0400, Mark M. Hoffman said: > I had a similar problem some months ago (except I use postfix). I found > out (by watching with ethereal) that Thunderbird just says: > > EHLO [127.0.0.1] > > So I modified /etc/postfix/main.cf to this: > > smtp_helo_name = [10.17.17.3] > > ...and all was working again. Question to email gurus: is there anything > wrong with that? There are 2 'correct' (for some value of correct - the RFC's are fuzzy about what is an acceptable HELO string) ways of doing this. Either of HELO fqdn or HELO [IP] - note that when you use your IP, you must use the square brackets. All that being said, many sites, like verizon and aol, are now refusing mail based on the HELO string if it is unroutable or has other problems. An address in RFC1918 address space would certainly qualify as 'having problems', I would think. If you want to send mail directly to other sites, then you will want to make sure that forward and reverse DNS match, and that you say HELO with whatever the fqdn of your rDNS is. In other words: 216.158.52.10 = mail.lobefin.net mail.lobefin.net = 216.158.52.10 my HELO string is mail.lobefin.net I have several other addresses that resolve to 216.158.52.10, and mail.lobefin.net actually resolves to two IPs at the moment, but the rDNS only resolves to one fqdn, so that is the one to use. -- -------------------------------------------------------------------------- | Stephen Gran | I think my career is ruined! | | steve@lobefin.net | | | http://www.lobefin.net/~steve | | -------------------------------------------------------------------------- Attachment:
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