I already have 2 existing gmail accounts on thunderbird and I wanted to add a new one, but TB keep saying that my password or username is incorrect. In this new account, I enabled IMAP and POP, and I've also enabled the access for "insecure apps". I'm not using the 2 step verification. I don't understand why I can't add this account because I did the same thing for my 2 others and it worked (created them 1 or 2 years ago and added them in TB 3 months ago). I already searched in the forum for a fix, everybody was saying "enable access for insecure apps!", but I did that and it didn't worked... (Also, I'm only using letters, numbers and characters that worked in my other accounts fo my password) I can use my gmail account as it is but I really don't like the interface and I want my 3 accounts on the same place. Can somebody help me?