Hi Viktor, On 8/6/25 09:07, Viktor Dukhovni via Exim-users wrote:
# Exim filter if personal alias [email protected] then unseen mail subject "Automatic reply: $h_subject:" from "[email protected]" extra_headers "Content-Type: text/plain; charset=UTF-8" file ./.reply.msg once ./.reply once_repeat 7d endifThis filter is not a good idea. It appears to fail to take into account the essential requirements of RFC3834: <https://datatracker.ietf.org/doc/html/rfc3834> in particular the exceptions listed in: <https://datatracker.ietf.org/doc/html/rfc3834#section-2> and ensuring that auto-reply envelope sender is the NULL sender: <>. So unless those requirements are built-in features of the filter syntax, this filter MUST NOT be used without appropriate modifications.
The docs say that the "mail" command has "no effect when the incoming message is a bounce (delivery error) message, and messages sent by this means are treated as if they were reporting delivery errors. Thus, they should never themselves cause a bounce message to be returned." (https://www.exim.org/exim-html-current/doc/html/spec_html/filter_ch-exim_filter_files.html#SECTmail) And indeed, the Return-path: header of so-generated response messages is <> (I've checked). Assuming I'm understanding things correctly, this should take care of it. Best, Peter -- ## subscription configuration (requires account): ## https://lists.exim.org/mailman3/postorius/lists/exim-users.lists.exim.org/ ## unsubscribe (doesn't require an account): ## [email protected] ## Exim details at http://www.exim.org/ ## Please use the Wiki with this list - http://wiki.exim.org/
