I recently set up MiaB, with a domain from Namecheap and an instance from BuyVM (in Europe, if that makes any difference). I’m having trouble delivering to Office365 domains, particularly academic domains.
To provide some examples:
Mail to outlook.com is delivered to Junk. After marking these as not spam, they deliver.
Mail to yale.edu (Yale/NHH) is delivered to Junk. After marking these as not spam, they deliver.
Anyone seen an issue like this? If anyone has a moment it could be helpful if you could try emailing me from a MiaB to moerner@uchicago.edu, and I could see if I can get your email. Could be something idiosyncratic about their setup (and Stanford’s).
Unfortunately nothing seems to stand out. One other thing I tried before doing this is to switch to sending HTML email; previously I was sending text email. Unfortunately, HTML email still didn’t go through to the problematic domains.
Thanks, @alento: First, the mailq is empty. Second, I’m happy to move to Slack, although I’m about to be in 5 hours of meetings, so I don’t think I’ll hit the 20 message limit today!
I think I figured out the problem: I’m getting blocked by Proofpoint. They don’t list my IP address as blocked (https://ipcheck.proofpoint.com/?ip=104.244.74.200), and nothing shows up in my logs in my Proofpoint quarantine panel, but when I explicitly whitelist my MiaB address, the email goes through. I also don’t see Proofpoint errors in /var/log/mail.log, only things like this:
It seems like there are a number of threads about Proofpoint, so I’ll look through those and try to figure out how to contact them, hopefully through my employer who uses them.
Sorry to resurrect an old thread, but I wanted to report on my progress. Unsurprisingly my attempts to get in touch with ProofPoint were unsuccessful.
However, about a month ago, I switched hosting providers (from Frantech/BuyVM) to Lunanode. This also involved switching locations from Luxembourg to Canada. And now my emails are accepted by ProofPoint. So if anyone faces a similar problem, you might want to try switching hosting providers as a last resort.
