On Sun, Jun 16, 2019 at 05:46:52PM +0200, Stefan Bauer wrote:
> Some of our users use o365 but would like to use our service for outgoing
> mails. We are offering smtp sending services. Integrating our service in
> o365 is tricky, as one can only specify a smarthost but microsoft does not
> offer any kind of authentication for smarthosts.
Are these individual users or cloud-hosted domains? Who's authorized
to ask Microsoft to route their outbound traffic through your relay?
Can you distinguish one such Office365 sender from another? ...
What's the point (if I may ask) of having their mail sent through
your relay? I assume that Microsoft could quite easily send their
outbound traffic directly to its destination.
--
Viktor.
