* 2022-12-09 20:39:34-0600, Greg Marks wrote: > Is there a way to tell the Postfix sendmail command not to alter any > such lines ["From" lines] in the body of the message? I can't answer your actual question but I think Postfix and other "sendmails" do the right thing. In my opinion you shouldn't change them do the wrong thing but fix the problem elsewhere. Prepare your message in such way that it is encoded in quoted printable or base64 so that there is no plain "From" in the beginning of any line in the body. Letters in "From" don't need encoding in quoted printable but email clients may still encode it because they know what sendmail programs do. Probably Mutt email client can automatically do all the encoding and pass the fully compliant message to sendmail. Mutt can be used in command line. I didn't test it because I don't have any sendmails installed. A lower level option for constructing valid emails is "mime-construct". From letters are in the beginning of this line because I want to test my own message and email client: the file that is saved locally in my computer and the file which comes through the mailing list. -- /// Teemu Likonen - .-.. https://www.iki.fi/tlikonen/ // OpenPGP: 6965F03973F0D4CA22B9410F0F2CAE0E07608462
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