On 2022-01-24 07:20, Tim van der Molen wrote:
Hi,
Martijn van Duren (2022-01-23 20:13 +0100):
> From: r...@relayclient.example.com (Cron Daemon)
According to RFC5322 section 3.4[0] this is not a valid e-mail format.
Just to point out this actually is valid. Text in parentheses is a
comment. See RFC 5322 section 3.2.2. Also this quote from section 3.4
which describes the format used above:
Note: Some legacy implementations used the simple form where the
addr-spec appears without the angle brackets, but included the
name of the recipient in parentheses as a comment following the
addr-spec. Since the meaning of the information in a comment is
unspecified, implementations SHOULD use the full name-addr form
of
the mailbox, instead of the legacy form, to specify the display
name associated with a mailbox. Also, because some legacy
implementations interpret the comment, comments generally SHOULD
NOT be used in address fields to avoid confusing such
implementations.
Best,
Tim
After the email from Martjin I posted a question to Server Fault[1],
because I find both 5321 and 5322 I often misread, and based on some
helpful responses it is not clear to me that this is an acceptable From:
syntax. Even if it is, it seems to be at best a SHOULD NOT, so I'm
trying to figure by going backwards where in the Ubuntu/Debian/cron
chain of packaging, configuring, compiling, or coding this format
actually comes from, but I have a feeling this ends up being a long
goose chase.
Thank you,
Paul
[1] https://serverfault.com/q/1090902/153188
