Like the author, I've been running my own mailserver for over a decade and am very conscientious about ensuring that no attackers use it as a spam relay.
While the vast majority of the people I exchange email with don't use GMail at all, so it can take a while before I notice any issues with it, I did happen to notice that GMail was rejecting my outgoing email a couple of weeks ago.
This week, I finally got around to trying to address the problem (it's not high priority because having GMail reject my emails isn't really a huge deal).
...and I found that it is working again without my changing anything. Weirdness abounds.
Like the author, I've been running my own mailserver for over a decade and am very conscientious about ensuring that no attackers use it as a spam relay.
While the vast majority of the people I exchange email with don't use GMail at all, so it can take a while before I notice any issues with it, I did happen to notice that GMail was rejecting my outgoing email a couple of weeks ago.
This week, I finally got around to trying to address the problem (it's not high priority because having GMail reject my emails isn't really a huge deal).
...and I found that it is working again without my changing anything. Weirdness abounds.