I am trying to allow an external helpdesk ticketing system send emails using their email server as an internal user. Basically spoofing my email address. When doing so DMARC verification is failing (for obvious reasons). However, attempting to bypass...
We use Cisco Umbrella and currently have a policy that does not allow Online File Sharing/Storage such as Dropbox or Box.com. Umbrella makes blocking these super simple. However, there have been legitimate business use cases where a vendor may need t...
We have 2 C100V virtual appliances in a cluster. I have recently setup Cisco Ironport Email Encryption. I have everything setup and it works on one of my Ironports....but not the other. They load balance on sending so when the message is processed by...
So, I use the Jabber client on Windows as a phone for CUCM. I have a headset that I use and it doubles and my headset for meetings through applications like zoom, Teams, etc. The issue I have is if I get a phone call during a meeting, the Jabber clie...
I'm looking for some troubleshooting tips on an ASA 5516. The outside interface is connected to a Cable Modem with a 300Mbps/25Mbps advertised speed. Typically I get around 325 down and 30 up. After a period of time, maybe 30 minutes I haven't timed ...
My solution was to setup the software to send as our domian by adding DKIM records in our DNS. This is a better solution to the problem anyway since bypassing DMARC would allow any other sender from the vendors domain to bypass DMARC.
I find that the accepted solution here is incorrect for the exact question. The provided solution only finds accepted messaged of the specified sizes. However, it will NOT find messages that are rejected based on size limitations. For that you need t...
Yes, I did catch that in the documentation. To make sure I created a new address list just for DMARC. I set the list type to Domains only and added domains either in the format @mydomain.com or @.no.itsnot.com.
Thanks @Ken Stieers, The first way is what the document I posted says to do. However, it does not do what I expected the DMARC check still fails. I haven't tried the header method yet. I have used the HAT to do this very thing and was successful. How...
I wanted to update on the solution (though not a good one) that fixed my issue. I decided to do an upgrade over the weekend last week. As part of the update a restart is required. After completing the upgrade and restart, both appliances began encryp...
