Suggest an alternative to

valid_email2

ActiveModel validation for email. Including MX lookup and disposable email blacklist

Why do you think that https://github.com/FGRibreau/mailchecker is a good alternative to valid_email2

A URL to the alternative repo (e.g. GitHub, GitLab)

Here you can share your experience with the project you are suggesting or its comparison with valid_email2. Optional.

A valid email to send you a verification link when necessary or log in.