noname email vertification

why the verification email content like this?

and if i download

my username: rfgd_18827677

That’s very strange and shouldn’t be happening. Which script are you using to send this e-mail?

script that I use is oxwall and I install it in Softaculous

and sorry I could not speak English so I translated with google translate.

if anyone can help me, I am very tired with this problem?