[deanhills]

are you sure none else has changed the number in the mean time. like if someone was handling your responsibilities before you.

last resort might be contacting customer care for help.

this really sks. i gotta check my old accounts and delete the ones i dont use anymore. thanks for the heads up.

I think I've found the problem.  Maybe you can enlighten me here.  In November 2018 this host changed servers from a dedicated server in France (OVH) to a VPS in Germany (Contabo).  Now when that happens, does that have an effect on the DKIM and SPF?  As the name servers of course changed, and the DNS also changed completely.

The Twitter notifications completely stopped at the same time.  So could that be the reason that the Twitter notifications also stopped?

Also, I then did a check with https://toolbox.googleapps.com/apps/checkmx/  and this was the result!

Note that there are DKIM and SPF records in the WHM for the domain - but maybe after the server change last November something happened so they aren't working any longer, or am I misreading the Google checker?