Alan Hamlett
Alan Hamlett reviewedUpLeadB2B Contact Data Provider with Real-Time Verified Emails.
 Not RecommendedPros: 

Never used

Cons: 

Multiple unsolicited spam emails without unsubscribe link

They keep spamming me emails with a link to this post without unsubscribe link and without ever signing up for their emails.

Alan Hamlett has never used this product.
Paul Gigante
Paul Gigante@gigantor · Saves the Day!
same here. super annoying.
Nick Georgiou
Nick Georgiou@nick_txt · Developer, Firecannon
Just report the emails as spam. Gmail will know what to do next time they try and send unsolicited emails.