HighLevel now verifies email addresses during contact import. Teams turn on the option with a new checkbox on the final step of Contact Import, so invalid addresses are flagged before any email is sent.
The verification runs after the import starts. Progress shows as Processing and then Completed under Bulk Actions.
Afterwards, the Email Verification Status filter on the Contacts page separates valid and invalid contacts. Smart Lists can then hold each group for its own follow-up. The source does not state any extra cost or plan limits.