1) Sending mail to other domain (external) using Squirrelmail, gives me a,
Considered UNSOLICITED BULK EMAIL, apparently from you
Using Thunderbird from my Ubuntu Desktop (within same LAN as mailserver) to send same mail to external domain, works ok. I have set the relayhost = [smtp.myisp.com] in Postfix main.cf. Why is Squirrelmail doing this?
My ISPs mailserver is ok according to the blacklists above.