Jethro R Binks wrote:


On a perhaps related note (but without wishing to detract from the above discussion), for many months I have been bugged by a problem where I certain messages received by Exim cannot be forwarded to local MS Exchange servers (2003, and maybe 2007 too). Exim notes the error:

SMTP error from remote mail server after end of data: 451 4.7.0 Timeout waiting for client input

Eventually they time out off the queue. It seems to be particularly common for mail from topica.com, but I have noticed other sources too.

Yesterday I noticed that the body of these mails does not terminate with CRLF, there is no line termination at all, and I'm guessing that is the issue.

Has anyone else observed this?


Yes, MS Exchange only accepts CRLF and doesn't recognize bare LF (while exim accepts both). If you issue LF and wait for the answer from Exchange, you will never receive it.

Attachment: smime.p7s
Description: S/MIME Cryptographic Signature

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