We recently imported a list of about 31,000 emails and while Advanced Import caught approximately 4 invalid emails and discarded them, it did let some invalid emails through, which we are finding as we send out our first email distribution.
The invalid emails were situations where a valid email had some additional junk on the end, like “emailaddress.net8” or “emailaddress.com239”
Hi, the import uses a generic wp-provided function to validate, formally, an email. Email with non existent TLDs cannot be recognized since the validator has not a list of valid TLDs.