1)   MailCrawl 1.14
Regardless if you need targeted or untargeted emails, MailCrawl is what you should use. It detects every single email on a site, not only those in mailto tags. Duplicates and invalid emails are instantly removed.

 2)   ProCrawl 1.32
ProCrawl high speed email extractor will search mail servers for emails. This is the ultimate way to find emails since they are verified as they are collected.