Thank You After Interview Email Thank-you Letters After A Job Interview. Email And By Mail?

Thank-you letters after a job interview. Email and by mail? - thank you after interview email

I sent an email to thank after an interview. I will send you an official letter of thanks written and e-mail, but I'm still undecided. Perhaps TOOO seems long, thanks to email and thank you letter? So, I believe in them. I did not send an official letter of thanks is not it? Thank you for ur answers!