On 09/11/2020 12:36, Mathieu Gosset wrote:

Hello,

One year ago a bug was reported regarding pigeonhole vacation plugin https://www.mail-archive.com/dovecot@dovecot.org/msg78588.html

a mail sent to User@domain.com instead of user@domain.com will generate a " vacation action: discarding vacation response for implicitly delivered message; no known (envelope) recipient address found in message headers (recipient=<user@domain.com>, and no additional `:addresses' are specified)" and no auto-response will be sent

the problem seems to be located in /src/lib-sieve/plugins/vacation/cmd-vacation.c and the _contains_my_address_() function

the comparison is done using dovecot's lib-smtp (src/lib-smtp/smtp-address.h) smtp_address_equals() function, which returns smtp_address_cmp(.) == 0;

smtp_address_cmp() does a case insensitive comparison of the domain parts (using null_strcasecmp()) and a case sensitive comparison of the local parts (using null_strcmp())

There is probably a good reason why the local parts comparison is case sensitive within smtp_address_cmp(), but having vacation rely on that function causes the problem described above.

Is there any plan to fix that ?

It's DOP-1424 and according to the bug tracker it is fixed per 2.3.10.1.

Regards,

Stephan.