I have hit the common issue of my DO IP address being blocked by hotmail, after 10+ years of trouble free usage!
They are completely unhelpful on why this is happening now so I am trying to sort it myself.
I have post...
Why doesn't Digital Ocean return an A record for hotmail.com??
dig @ns2.digitalocean.com hotmail.com
; <<>> DiG 9.9.5-3ubuntu0.3-Ubuntu <<>> @ns2.digitalocean.com hotmail.com
; (2 servers found)
;; global options:...
I have the infamous "421 4.7.1 [TS03] All messages from xx will be permanently deferred; Retrying will NOT succeed. See http://postmaster.yahoo.com/421-ts03.html" error from Yahoo.
My mail server is set up wi...