legacy NW user converted to DL with 6 inserted before SM# ...

Skymiles -> Manage my account -> Manage Profile/My Profile -> BASIC INFO (open) -> Email Address/SMS TEXT

I have this set to Personal/TEXT/email address

The emails I get from delta don't honor the text format, and I don't get the marketing mails/statements i'm signed up for. While not entirely a website bug, all the other emails I get are HTML (*vomit*) and don't honor this text part.

The good news is you haven't dropped my 'known traveller id' recently.