All emails sent by php from a website (Debian 6 / ISPConfig3) have the same address (web20@server1.example.com).
The smtp server of the recipient sees as the sender:
web20@server1.example.com
Code:
MAIL FROM: <web20@server1.example.com>
Trying to use a relayhost in the log of the same I see:
Code:
MAIL FROM:<> AUTH=<> 250 Requested mail action okay, completed 43 22 sm
MAIL FROM:<> AUTH=<> 250 Requested mail action okay, completed 43 22 sm
RCPT RCPT TO:<web20@server1.example.com> 250 Requested mail action okay, completed 43 37 sm
RCPT RCPT TO:<web20@server1.example.com> 250 Requested mail action okay, completed 43 37 sm
In the above example, the message was sent to two recipients, each of which has been replaced.
Thank for any help.