On Thu, 13 Oct 2016 22:18:21 +0100, Ralph Corderoy said: > I tend to think those (X-)?Mailer headers are a bit of a waste of space > and time. The same value in thousands of copies of emails. All those > bytes, clock cycles, etc., when nothing cares about the value.
Until you're trying to track down a weird bug and root-cause it to the fact that Lotus Notes uses different values for boundary= on a multipart/ (it uses two blanks in the header, but only one in the body), so my .procmailrc has in it: # Lotus Notes is a boil on the buttocks of e-mail.,... :0 hwf *^X-Mailer:.*(IBM|Lotus) Notes | sed -e 's/boundary="=_alternative /boundary="=_alternative /' You spend a few decades doing e-mail support as one of your hats, you learn to be glad that MUA's put in X-Mailer:, and most MTA's stick a 'with $software' clause into their Recieved: headers.
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