Forum Discussion

Copper Contributor

Aug 14, 2018

Solved

550 5.7.64 Relay Access Denied ATTR36

Hello, I just setup a client with a new Office365 and I am running into problems with inbound email bouncing. The issue seems to be two problems. First email are bouncing due to: "Host or...

office 365

null null
Sep 20, 2018
Hi,

After a week of calling Microsoft support twice a day they finally fixed it.
They didn't tell me what the issue was.

I guess who ever runs into the same issue will need to do the same.

Thank you,
Avrom

Adam Ochs

Iron Contributor

Sep 18, 2018

Hello Avrom,

Normally the 550 5.7.64 Relay Access Denied ATTR36 is related to an invalid cert when trying to relay mail.

As you said an incorrect connector could cause this, but I would more expect something like the other user suggested, where they are attempting to relay the messages from another mail system through O365 and getting the problem.

I have personally seen this when on-prem values get changed (IP address, cert, etc) in a hybrid setup. Are you running a hybrid setup at all? I assume not since you said you have no connectors?

If that is true, and you do not have connectors setup in any way, I am guessing this is an issue on the O365 side, and unfortunately support is probably your best route.

Adam

null null

Copper Contributor

Sep 20, 2018

Hi,

After a week of calling Microsoft support twice a day they finally fixed it.

They didn't tell me what the issue was.

I guess who ever runs into the same issue will need to do the same.

Thank you,

Avrom

Arjun Shajan
Copper Contributor
Sep 27, 2018
Could you pls help us with the ticket number or the troubleshooting steps of it.
I am stuck on the same **bleep** scenario!