On Tue, 2014-11-18 at 12:49 +0100, Michał Giżyński wrote:
> Thunderbird receive whole statement "This message contain spam and was
> rejected, if you don't agree with that please contact us (0011223344)"
> whereas Outlook 2013 receive only 20 characters from last line of
> message "please contact us (0".
>
> Below tcpflow log:
> x.x.x.x.00587-y.y.y.y.35189: 550-This message contain spam and was
> rejected, if you don't agree with that
> 550 please contact us (0011223344).
>
> Have you ever seen this before ?
Yes, Outlook has known issues with multi-line responses.
You want to look at the "no_multiline_responses" item in
http://www.exim.org/exim-html-current/doc/html/spec_html/ch-access_control_lists.html#SECTcontrols and ensure that the first line of any SMTP responses sent to such clients includes all the information you want to provide, as they'll never see the other lines.
Regards,
Adam
