XFOR: IMC Not Receiving Inbound Mail from UNIX Hosts (152944)
The information in this article applies to:
- Microsoft Exchange Server 4.0
This article was previously published under Q152944 SYMPTOMS
After you apply Service Pack 2 to an Exchange Server running the Internet
Mail Connector (IMC), connections from previously working SMTP hosts may
fail with the following:
Event ID: 4051
Source: MSEXCHANGEIMC
Description:
A time-out occurred while trying to receive mail from <server> and while
waiting for the message body.
The SMTP mail is not received by the Exchange IMC and mail destined for the
IMC backs up in queues on the foreign mail system.
CAUSE
The Exchange IMC from Service Pack 2 expects a <CRLF>.<CRLF> to delineate
the end of mail messages in accordance with RFC821, section 3.1. Prior to
Service Pack 2 the Exchange IMC would accept a message terminated with
<LF>.<LF>. This change in implementation of the RFC in Service Pack 2
affects many existing Exchange implementations.
STATUS
Microsoft has confirmed this to be a problem in Microsoft Exchange Server
version 4.0. 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):
WORKAROUND
Many SMTP mail hosts allow for the configuration of this "message
termination sequence." Consult the specific SMTP mailer's documentation and
configure the mailer to use <CRLF>.<CRLF> for this sequence.
| Modification Type: | Minor | Last Reviewed: | 4/28/2005 |
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| Keywords: | kbusage KB152944 |
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