Fixed - The US SMTP server is no longer listed on the SORBS block list. (22:43 UTC — Oct 30)
Our US SMTP server is currently listed on the SORBS email block list. We’ve already gone through the de-listing process and expect the server to be de-listed in 48 hours or less.
We’ll update this post when we confirm the server is de-listed. (21:32 UTC — Oct 27)