Have a look at barracuda.com or do some 3rd party research to form your own opinion. Source: over 1 year ago

We're utilizing the cloud hosted Barracuda archiver solution. There is an option to resend messages from the archiver to O365, but they're getting caught in the anti-phishing default policy. Since they're coming from Barracuda mail servers but the original 'from' address is still the original sender so it's getting caught for phishing which makes perfect sense. I've added the barracuda.com domain for... Source: over 1 year ago

Anybody know what's going on? I believe the commercial side (barracuda.com) uses barracudacentral.org as it's source for the RBLs but I could be mistaken. Source: about 2 years ago

You're trusting the service (openpgp.org seems to be the only server offering this?) to serve up your correct key. Source: almost 2 years ago

Hello, I used openpgp.org to create a set of pgp keys, and I tested them out and all is well. I went to a web site and uploaded my pub key fine, but now it asks for a Verification Code/Key? What is that, and how do I get that off my newly created PGP keys? Thanks. Source: over 2 years ago

Not sure, but it looks like keys.openpgp.org is up. I found a keyserver still running where I could find my public key (this one: http://pgp.mit.edu/) and uploaded it to the openpgp.org one. This seems rather recent; there's a related post on r/GnuPG. Source: almost 3 years ago

Anyways; it looks like openpgp.org is trying to get on the right side of these crowds ... Source: almost 3 years ago