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Exchange 2003 - email from PHP script not arriving

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  • Exchange 2003 - email from PHP script not arriving

    An odd one:

    SBS 2003 SP2 (Exhange at SP2) -- seems more Exchange related so posting in this forum not SBS. Emails coming in via SMTP.

    An external website generates emails from a form. FROM address is same as TO address - both [email protected]. Nothing is received at Exchange and (AFAIK) no NDR comes back to website. Website also generates email to person submitting form, which arrives OK so appears to be nothing wrong with website's mail server.

    Other email direct to [email protected] arrives fine at Exchange, so no address filtering in place or problems with the address. ISP advise me they have nothing in place which might filter out the email.

    Only thing I can think of is that, since the FROM address is already known to Exchange, it might be dropping the email from outside as an attempt to relay. I have asked the web developer to change to emails from a different address (not in an accepted domain).

    Anyone got any thoughts on this or suggestions as to further troubleshooting?
    Tom Jones
    MCT, MCSE (2000:Security & 2003), MCSA:Security & Messaging, MCDBA, MCDST, MCITP(EA, EMA, SA, EDA, ES, CS), MCTS, MCP, Sec+
    IT Trainer / Consultant
    Ossian Ltd

    ** Remember to give credit where credit is due and leave reputation points where appropriate **

  • #2
    Re: Exchange 2003 - email from PHP script not arriving

    I expect this will be the usual ISP configuration nonsense.
    Most web hosts/ISPs will setup their servers to presume that they are responsible for everything - including email. The server will not even attempt to deliver email to an external host, it will simply try internally and nothing else.
    I have seen this time and time again.

    If possible, set the script to use an external host name and ensure that it resolves correctly on the server to the correct IP address.

    Simon Butler
    Exchange MVP

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