Hello
[193.247.250.7 listed in dnsbl-1.uceprotect.net] [Blocked - see http://www.spamcop.net/bl.shtml?193.247.250.7] [193.247.250.7 listed in cbl.abuseat.org]
I suppose I'm not the only one constantly getting customers complaints about email from mobile devices getting flagged as spam because the swisscom gprs ip addresses can be constantly found in various blacklists.
According to my last contact with the swisscom abuse desk about that issue is that they need to know time, ip and port number from which the email arrived.
So I want to share my 'sendmail' config to enable getting the port added in the email headers:
define(`confRECEIVED_HEADER',`$?sfrom $s $.$?_($?s$|from $.$_ Port: ${client_port}) $.$?{auth_type}(authenticated) $.by $j ($v/$Z)$?r with $r$. id $i$?u for $u; $|; $.$b')dnl dnl
will get you a Received: header which when submitted via spamassassin or similar, makes it possible for swisscom to find their infected customers.
Mit freundlichen Grüssen
Benoit Panizzon