[exim-dev] [Bug 2224] DKIM: validation error: RSA_LONG_LINE

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Author: admin
Date:  
To: exim-dev
Old-Topics: [exim-dev] [Bug 2224] New: DKIM: validation error: RSA_LONG_LINE
Subject: [exim-dev] [Bug 2224] DKIM: validation error: RSA_LONG_LINE
https://bugs.exim.org/show_bug.cgi?id=2224

--- Comment #9 from Bjoern Jacke <bjoern@???> ---
it might be worth mentioning that the section 4.5.3.1.6 which was mentioned in
comment 1 also contains the sentence "This number may be increased by the use
of SMTP Service Extensions." This means long lines are not generally
disallowed.

>From my understanding BINARYMIME from RFC 3030 also allows arbitrary lenghts

here as long as the chunksize is not exceeded. Also RFC 7103 says in section 6
that for binary mode SMTP (BINARYMIME) CRLF is not a line separator. This means
that for SMTP connections using the chunking extension this is actually a valid
bug in exim. Recent Postfix releases for example can send such messages that
trigger this DKIM signing bug in exim.

A workaround for this problem is to set

chunking_advertise_hosts =

in the exim configuration. It would be a pitty if this bug stays a wontfix.

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