Hello,
I am currently seeing an issue in which users of Exchange on one of our servers are not able to send OoO (out of office) emails via a smart host.Exchange forms the emails and attempts to send, however it is rejected by the smart host as it appears no “MAIL FROM:<>” is being added. Please see log snippet below.
Emails sent from Outlook by the same user do have a value in the “MAIL FROM:<>” field.
Has anyone had this issue before, and would you mind sharing how you dealt with it.
Any help is appreciated.
2016-09-01T15:09:07.365Z,Windows SBS Internet Send SBS-SVR01,08D3D24F38B1E6D5,2,192.168.0.50:55033,62.24.139.20:25,<,220 cm2gb1 smtp.talktalk.net
ESMTP server ready,
2016-09-01T15:09:07.365Z,Windows SBS Internet Send SBS-SVR01,08D3D24F38B1E6D5,3,192.168.0.50:55033,62.24.139.20:25,>,EHLO {removed
for posting},
2016-09-01T15:09:07.398Z,Windows SBS Internet Send SBS-SVR01,08D3D24F38B1E6D5,4,192.168.0.50:55033,62.24.139.20:25,<,"250-cm2gb1
hello [removed for posting], pleased to meet you",
2016-09-01T15:09:07.398Z,Windows SBS Internet Send SBS-SVR01,08D3D24F38B1E6D5,5,192.168.0.50:55033,62.24.139.20:25,<,250-HELP,
2016-09-01T15:09:07.398Z,Windows SBS Internet Send SBS-SVR01,08D3D24F38B1E6D5,6,192.168.0.50:55033,62.24.139.20:25,<,250-SIZE 30000000,
2016-09-01T15:09:07.398Z,Windows SBS Internet Send SBS-SVR01,08D3D24F38B1E6D5,7,192.168.0.50:55033,62.24.139.20:25,<,250-ENHANCEDSTATUSCODES,
2016-09-01T15:09:07.398Z,Windows SBS Internet Send SBS-SVR01,08D3D24F38B1E6D5,8,192.168.0.50:55033,62.24.139.20:25,<,250-8BITMIME,
2016-09-01T15:09:07.398Z,Windows SBS Internet Send SBS-SVR01,08D3D24F38B1E6D5,9,192.168.0.50:55033,62.24.139.20:25,<,250 OK,
2016-09-01T15:09:07.399Z,Windows SBS Internet Send SBS-SVR01,08D3D24F38B1E6D5,10,192.168.0.50:55033,62.24.139.20:25,*,596,sending message
2016-09-01T15:09:07.399Z,Windows SBS Internet Send SBS-SVR01,08D3D24F38B1E6D5,11,192.168.0.50:55033,62.24.139.20:25,>,MAIL FROM:<>
SIZE=2711,
2016-09-01T15:09:08.610Z,Windows SBS Internet Send SBS-SVR01,08D3D24F38B1E6D5,12,192.168.0.50:55033,62.24.139.20:25,<,550 5.1.0 fTc3b6Aq9TrRi
Sender Domain Invalid (TT420),
2016-09-01T15:09:08.611Z,Windows SBS Internet Send SBS-SVR01,08D3D24F38B1E6D5,13,192.168.0.50:55033,62.24.139.20:25,>,QUIT,