Alex wrote:
> On of my friends can't send me emails.
>
> This is the reject message of my server
>
> 2007-01-15 23:31:47 rejected HELO from
> 22.red-213-97-32.staticip.rima-tde.net [213.97.32.22]: syntactically invalid
> argument(s): SERVIDOR_LH3.figueres.org
The _ is an illegal character. Get him (or the administrator of that
system) to change the HELO name provided by his server
(SERVIDOR_LH3.figueres.org). Thanks to Micro$uck for that common error.
Of course, you could add _ as an acceptable character in your exim
config and then provide a whitelisting facility that only allows servers
that have contacted you to pass through.
Someone on the list provided this one a long time ago:
# in common configu
helo_allow_chars = _
# in RCPT acl on my system.. they had theirs HELO acl I think.
# I also have a postmaster accept before this.. so they can contact me
deny message = syntactically invalid argument(s): \
$sender_helo_name http://www.linuxwan.net/email/underscore.html
hosts = !+relay_from_hosts : *
condition = \
${if \
and { \
{ match {$sender_helo_name}{_} } \
{ \
!eq \
{${lookup{${lc:$sender_helo_name}} \
lsearch{/etc/exim/broken_helo_hosts} \
{yes}{no} \
}} \
{yes} \
} \
} \
{true} \
}
I think it was the host of
http://apollo.laserfence.net/underscore.html
