Hi.
one of our machines has a problem with outgoing mails getting blocked by our mail gateway. The local MTA logs the error as follows (I mystified host and mail addresses):
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2015-10-26 11:11:22 1ZpBkJ-0002B9-FL SMTP timeout while connected to our.mailgateway.local [10.255.252.92] after sending data block (16378 bytes written): Connection timed out
2015-10-26 11:11:22 1ZpBkJ-0002B9-FL == rcvr@domain.cxmmailto:rcvr@domain.cxm mailto:rcvr@domain.cxm> R=smarthost T=remote_smtp_smarthost defer (110): Connection timed out: SMTP timeout while connected to our.mailgateway.local [10.255.252.92] after sending data block (16378 bytes written)
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Logging on the gateway shows more detail:
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Sep 18 10:32:07 nefw1 %ASA-4-108004: ESMTP Classification: Dropped connection for ESMTP Request from ProvDMZ:10.255.250.13/56134 to coresw_3_4:10.255.252.92/25; matched Class 4: header line length gt 998
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A quick view on the message headers showed that indeed all of them have a „References“ line with more than 1100 characters, which is, according to RFC 822http://www.faqs.org/rfcs/rfc822.html way too much:
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There are two limits that this specification places on the number of characters in a line. Each line of characters MUST be no more than 998 characters, and SHOULD be no more than 78 characters, excluding the CRLF.
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So my question is:
* Is this a bug that only affects version 3.1.3 (and smaller)?
* If not: How does OTRS create these lines? Is it a default Perl module that handles the mail header lines?
Regards
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Jan Dreyer
IT Administrator — Operations — A-SCM-IT IOX Expert
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