Pegasus Mail & Mercury

Thanks dear Thomas R. Stephenson But how and where we can use bit of code used by SquirrelMail to do the ESMTP auth?    

Hi, I'm using XAMPP on my server local so I have  Mercury  as SMTP  server.  When I try to send email from  php script the SMTP server response is: 553 We do not relay non-local mail, sorry. Can you help me? tanks 

I still have a problem with SMTP from offsite.   I had set up a SMPT users file with a test account which worked fine when I tested it from a system on our network however from outside using the same account I just get a one line error report.   The error message was something like 15: Peer connect failure (the host has refused ...