Bowie Bailey writes:
On 9/5/2014 7:39 PM, Sam Varshavchik wrote: > The presence of the "From " header /after/ the blank line is a tell-tale> sign that the message text was delivered to an mbox file, and then read back > from it, before being sent again. The "From " line is typically written when> a message gets delivered to an mbox file, at some point along the way.That shouldn't be the case. As I said, these messages are being forwarded by a 'cc' instruction in the user's .mailfilter file on the first server. Besides, the server uses maildirs, not mbox files.
This could very well happen before things arrive at this point.
I was trying to diagnose exactly what is happening by watching the communication between the servers, but I can't seem to turn off TLS when talking to the other Courier server. There used to be a /SECURITY=NONE switch in esmtproutes, but I don't see it in the man page now and it doesn't seem to do anything. Was this removed? How can I disable TLS between these servers so I can see the data stream?
Yes, it was removed, it's no longer necessary. Courier, when sending mail, will always use TLS if the receiving server has this capabilities. If an error occured while trying to establish TLS negotation, the message would've originally failed, and that setting was used to manually force TLS off, for individual servers. This is no longer necessary, Courier will requeue and retry the message without TLS, automatically.
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