On Sun, May 25, 2025 at 04:41:38PM +0100, Richard Lewis wrote:
i believe i read (sorry again: i used an android phone and accessed a
website that wasnt released as free software to find this information)
that gmail breaks lines because some RFC recommends lines should be less
than some length, and other free software rejcets long lines (doesnt
debian's default exim config do this as well?)
RFC 5321 ("SMTP"):
4.5.3.1.6. Text Line
The maximum total length of a text line including the <CRLF> is 1000
octets (not counting the leading dot duplicated for transparency).
This number may be increased by the use of SMTP Service Extensions.
I believe that exim4's default setting (which can be trivially overriden
in config) is sane here: Don't accept a message that you probably cannot
deliver.
HTH, HAND.
Greetings
Marc
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