I suspect the problem is that he's entered the E_Mail From address with the personal name in the E-mail address field that is supposed to be a simple SMTP address.  See <a href="http://www.oscommerce.info/kb/osCommerce/Administration_Tool/Configuration/156" title="http://www.oscommerce.info/kb/osCommerce/Administration_Tool/Configuration/156" mce_href="http://www.oscommerce.info/kb/osCommerce/Administration_Tool/Configuration/156">http://www.oscommerce.info/kb/osCommerce/Administration_Tool/Configuration/156</a>

<p>I hall</p><p>i´m using mercury 3year ago, perfectly, but now i have instaled OS-commerce, ( a free online store soft), and when i sedn mail from this my mercury reply this...</p><p>mercury smtp server... (correct) </p><p>Connection from x.x.x.x, Tue Mar 10 20:31:58 2009 HELO alcazaba MAIL FROM:<"Name surename" <mail@mail.com>> RCPT TO:<mymail@mail.com> DATA DATA - 93 lines, 3300 bytes. QUIT 1 sec. elapsed, connection closed Tue Mar 10 20:31:59 2009</p><p> mercury core module...</p><p>Tue 10, 20:32:03: Job MG00006A: sender address ' <mail@mail.com'<u><i><b> is invalid</b></i></u>    To: mymail (local) -OK  </p><p> and Finaly the mercury smtp client says...</p><p> 20:32:16: processing job MO00006B Resolved MX for 'company.net' to x.x.x.x Connecting to x.x.x.x MAIL FROM:< <mail@mail.com>>   550 5.1.0 < <mail@mail.com>> SIZE=3568 missing or malformed local 550 5.1.0 < <mail@mail.com>> SIZE=3568 missing or malformed local 20:32:17: 1 second elapsed, closing connection.  </p><p>I thinks may be the from format <"name surename"<mail@mail.com>> is not correct, ut other mail server work correctly </p><p> </p><p>Can you helpo my</p><p>Thanks  </p><p> </p><p>  </p>

<p>Right, there is an extra pair of < > there. Check the documentation for OS-commerce for how to input sender address. If nothing else simply mail@mail.com should work.</p><p>/Rolf </p>