Good Day A few years ago i setup my own mail server using the following link. http://www.howtoforge.com/iredmail-...ecot-clamav-spamassassin-amavisd-debian-5.0.1 Yesterday some virtual user’s complaint that when they send emails then the other person will see the senders email address is different For example if one person sends email using email@example.com and will show firstname.lastname@example.org at the receivers end. I have tested it and it only happens when email are send outbound. Is there any workaround or any place where I can go and check it he settings are correct? All my outbound mail is being relayed to outbound server. If I skip my server and send directly to that server then emails are sending correctly Thank you PS: Pardon my poor English.