Knowledge Base

XFOR: Internet Mail Service Does Not Advertise ESMTP on Connect

Article ID: 164060

Article Last Modified on 10/28/2006

Microsoft Exchange Server 5.0 Standard Edition

This article was previously published under Q164060

SUMMARY

The Microsoft Exchange Server Internet Mail Service (IMS) supports Extended Set of Simple Mail Transfer Protocol (ESMTP) commands, however it does not advertise its support of ESMTP on connect.

MORE INFORMATION

Hosts that support the Extended Set of Simple Mail Transfer Protocol (ESMTP) respond with the following:

    220-suns.nba.com Sendmail 8.6.12/8.6.9 ready at Wed, 19 Feb 1997
    15:36:48 -0600
    220 ESMTP spoken here

Even though the IMS supports these commands, the IMS response is as follows:

    220 chopper2.wspu.net Microsoft Exchange Internet Mail Service
    5.0.XXXX.0 ready

The ESMTP commands supported are referenced in RFC1869 and RFC1870.

STATUS

Microsoft has confirmed this to be a problem in Microsoft Exchange Server, version 5.0. This problem was corrected in the latest Microsoft Exchange Service Pack. For information on obtaining the Service Pack, query on the following word in the Microsoft Knowledge Base (without the spaces):

S E R V P A C K

Keywords: kbbug kbfix KB164060