10-21-2021 07:26 AM - edited 10-21-2021 07:26 AM
Hello!
We use Cisco ESA and we need the sender to receive the DSN from the recipient's mail server, not from Cisco ESA.
Please explain what needs to be configured.
10-21-2021 07:53 AM
10-21-2021 09:05 AM - edited 10-21-2021 09:17 AM
Hi, Ken.
Thanks for the reply.
I meant DSN for successfully delivered emails that are sent by our local users to external servers.
For example, what we need:
<sample@mail.ru>: delivery via mxs.mail.ru[94.100.180.104]:25: 250 OK
id=1mdabo-0008VJ-Df
But now we get:
Message sent to 'sample@mail.ru' SMTP module(domain mail.ru) reports:
relayed via 10.0.0.1,10.0.0.2
10-26-2021 12:51 AM
Any advice, please?
10-26-2021 11:15 AM
if I am reading this correctly you have the following case :
external sender -> Ironport -> your email like O365.
you want O365 to create a NDR instead of the Ironports. This should be standard behavior if you setup your default route in O365 to go back out via the Ironports.
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