Heads Up :
The post you are writing will appear in a public forum. Please ensure all content is appropriate for public consumption. Review the employee guidelines for the community here.
hi - we have an odd one we have been tracking. We are starting to find domains which reject our emails with DMARC failures.Our outbound email is signed by the ESA with it's own DKIM key and you can see it for example with gmail.com. However, our emai...
We recently upgraded our Cisco ESA and I notice there is a new check box option in SSL Configuration called "TLS Renegotiation". It seems to be checked by default - but doesn't seem to be mentioned in documentation. I'm wondering if we should turn it...
Just a question - do people still find the DHAP (Directory Harvest Attack Prevention) still useful? We've had it on for years but in the last couple of months had two major "denial of service" of email due to DHAP triggering and causing way more harm...
We have have the ESA (formerly Ironport) for a number of years. This year when we renewed our licence I noticed that the Cisco licencing group starts the licence (for 3 years in our case) from the date of purchase - not starting on the last day of th...
Turned out to be an third party issue (see https://forums.whirlpool.net.au/thread/3m01zjy6). They were inspecting email and binning emails which had failed DKIM signed headers in them. However, we will try to remove our onmicrosoft.com DKIM header fr...
You may want to take the 15kb message size and pro-rate it a bit depending on your actual average message size (I don't know what value to pro-rate it however). Ours for example is about 150kb. You can see average message size in the SMA (or ESA) rep...
