How do you know if an email address is valid? YL Mail Verifier can check emails before you send. Whether you're checking big lists of emails or just want to be sure an address is honest, YL Mail Verifier will help.
YL Mail Verifier is a really simple program. Simply enter an email address, and hit Verify. A moment later you'll have your yes or no. For cleaning contacts lists, this is useful as you can verify addresses, then export a list of just the good ones to replace your current list. However, in the shareware version exporting is disabled.
Unfortunately, importing email lists isn't as simple as it should be - YL Mail Verifier doesn't recognize the normal email@example.com, firstname.lastname@example.org way of listing addresses. In such cases you have to import separately, which is time consuming. However, multiple checks are pleasantly quick, at the basic level YL Mail Verifier works well.
It could do with email account syncing, so email lists can be automatically imported. However, YL Mail Verifier does provide good checks of email validity.