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[linux.debian.user] question about exim.




(onet was blocked, second try)
Hello.
Recently I found, that some mails (fetched witch fetchmail) does not reach my mailbox.
Done some check and:

--8<---------------cut here---------------start------------->8---
2018-05-07 11:44:14.306 [9516] 1fFcgn-0002TU-Pb H=(alfa.kjonca) [127.0.0.1]:53574 I=[127.0.0.1]:25 F=<sender@xxxxxxxxxxxx> rejected after DATA: header syntax ("@" or "." expected after "Undisclosed-Recipient": failing address in "To:" header is: <Undisclosed-Recipient:;@imap.poczta.onet.pl>): "@" or "." expected after "Undisclosed-Recipient": failing address in "To:" header is: <Undisclosed-Recipient:;@imap.poczta.onet.pl>
--8<---------------cut here---------------end--------------->8---

If I am not wrong default configuration changed in
/etc/exim4/conf.d/acl/40_exim4-config_check_data (now headers are
syntactically checked by default)

Unfortunately I got quite a lot "Undisclosed-Recipient:;" mails from
outlook users, and this is not going to be changed :(

How can I made exim accept these emails?

Temporarily I defined NO_CHECK_DATA_VERIFY_HEADER_SYNTAX macro (to
disable header syntax check) , but I
would prefer configure exim for accept "Undisclosed-Recipient:;" as only
exeption from header check.

How can I achieve this?
I looks like I have  write custom acl, but it is not obvious to me how to write
proper condition in such acl.

KJ

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