I have a personal domain and email serving with Dreamhost (mail.foo.com). I have IMAP set up on my desktop and various phones, laptops, and never had a problem.
With no warning or change to anything in my environment, this account stopped connecting to the host. Telnet to the smtp/imap ports fails, but normal traceroute is fine. The account is also fine on my phone over LTE. I also have two gmail accounts, which have no problems- so it's some sort of issue between my ISP (TWC) and email ports specifically with Dreamhost. I tested various other ports/ssl combinations (143, 993, 587, 25, etc). Nothing works.
Does anyone have some insight into what may be going on here?