I feel your pain. Some user just stubbornly don't accept that they got the wrong email address.
For such normal use case, I use Amazon SES as my transactional email sender. They deliver bounce reports in various channel (including HTTP) via their SNS service. See more info about it here: https://aws.amazon.com/blogs/messaging-and-targeting/handling-bounces-and-complaints/ Once you got the bounce report, which contains the email address, you'll know that the email does not exist. This works great in every project I encountered so far. It has a little acceptable limitation though, you can't tell unless you try sending an email. If you design your application in a way that users can resend confirmation emails. You'll able to provide a nice and friendly notice there. -- You received this message because you are subscribed to the Google Groups "Ruby on Rails: Talk" group. To unsubscribe from this group and stop receiving emails from it, send an email to rubyonrails-talk+unsubscr...@googlegroups.com. To view this discussion on the web visit https://groups.google.com/d/msgid/rubyonrails-talk/cbab3ba7-58a4-49f8-9d39-611428f0788b%40googlegroups.com.
