Leen de Braal wrote:
I am having troubles with mailservers on adsl lines connecting to sites,
that check for dns resolving.
Although a correct resolving is done on the name of the server (host
mail.sendingserver.tld) the other way round (host 111.222.333.444)
resolves to a name like ipxxxxxxxx.speed.dslprovider.tld.
(names and IP's here are not real of course)
How can I configure postfix to report a helo like
ipxxxxxxxx.speed.dslprovider.tld, so that the receiving server accepts?
I tried this by hand with a telnet to a troublesome server, and if i do it
this way, mail is accepted. So that's why I think this may be the
solution.
But if there is a better way, pls let me know.
The correct way to handle this would be to tell the admin of the ip
address space to set the correct ptr record. If that is not possible and
the line already has a static ip, look for an alternate provider.
Only if the above is not possible you could set the smtp_helo_name to your
current reverse dns name.
postconf -e "smtp_helo_name = ipxxxxxxxx.speed.dslprovider.tld"
postfix reload
If you are working on a dynamic line you should consider to either upgrade
to a static ip or at least to use a relayhost with a static ip.
Sandy
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