Hi Michael >Hi Colin, > >> Further investigation shows that although the sender is relaying off >>our server the TalkTalk server is picking up his home ADSL IP: >> >> The original message was received at Sun, 1 Mar 2015 19:23:59 GMT >> from 78-33-150-88.static.enta.net [78.33.150.88] > >To clarify: The client has a mailserver on ADSL and is relaying through >your BlueOnyx? Or is he using an email client and SMTP-Auth and sends >email through your BlueOnyx directly?
Yes - sending from email client using SMTP-auth. Outlook and Thunderbird. > >The distinct difference here: If he relays through you, the email >headers will still show the origin of the email to be his ADSL box and >your BlueOnyx will just be listed as relay in the 2nd line of the >headers. Hence the recipient sees the ADSL box as sender and applies all >the fishiness to it that this ADSL users IP address range might have. > >The degree of scrutiny that some SPAM filters apply varies naturally. >Some evaluate just the initial sender. Some just the last relay it came >from. Some evaluate all IPs listed in the header. That is what they are doing (all IPs listed). Can I Œthin¹ out the headers? > >Hence: As long as the IP address range of the ADSL sender shows up in >the headers his mails might not go through while using this way. > >If he's using an email client and SMTP-Auth (or webmail) and sends from >your server directly, then the mail should go through. Other than that >there is no easy way around this. Unfortunately that is what he is doing. It is only the TalkTalk servers that have a problem. Pity sendmail doesn¹t have the flexibility of Exchange type Œsend connectors¹ so that certain name spaces can be redirected to different smtp servers. Many thanks Colin _______________________________________________ Blueonyx mailing list Blueonyx@mail.blueonyx.it http://mail.blueonyx.it/mailman/listinfo/blueonyx