I got a random text from this number 321 406 8320 as well. The email was
[email protected] and was using Ally name also as many above.
"hey, i'll just be quick since i'm writing this from my phone. im ally, 23 yrs old, and a gurlfriend said you're cool so just hittin u up. so anyway, if u wanna get to know me, my digits are 321 406 8320"
Its 100% BS imo.