Forum Discussion
O365 Email to a Cisco ASA equals DKIM FAILURE
We are having a problem with one email recipient. They are using a Cisco ASA ESA. When we send emails to this client, they are filtered as spam and dropped. I was able to get them to send me the me...
Hey Jeff,
This does not seems to be an issue at your end.
What are you trying to send in the email ?
Have you tried sending a blank email without signatures ?
Thanks
This does not seems to be an issue at your end.
What are you trying to send in the email ?
Have you tried sending a blank email without signatures ?
Thanks
Thanks. That is my thought as well. I have ran several test against our DKIM, DMARC and SPF records and every test returns valid. It seems to only fail with this one client using a Cisco ASA appliance.
BTW, I did send a test message without our signature even as a simple text only (no formatting) without a response (which tells me that failed as well).
I am writing it off as a client end issue since no errors are appear on my end. I am not sure why MS recommeneded the key change since I have yet to find anything that supports that as a resolution. Let along making that kind of change just for one failure.