I recently made a Repl.it project that partially involves sending verification emails to users. However, as anyone would guess, these emails are entirely unauthorized, and I cannot add any SPF records to my domain because I do not know the domain of Repl.it’s SMTP server.
Does anyone know the domain I should use for an SPF record so that emails that I send (particularly using nodemailer) are actually authorized? If not, is there some other method I should be using?
Thank you, I ended up just doing that and it works perfectly. However, in Gmail when I click the user account associated with my email, it displays what appears to be a random 3 character hex with a colon before it (i.e. :128 or :13f). Any clue why?