If I have a file to upload with 10000 emails say, then either they have opted in via an auto-responder and therefore those emails are already validated, or I have purchased a list off someone, which is potentially a bit shady but I should just get them validated again with a double opt in.
The first thing that immediately caught my attention is that it's not using HTTPS by default. More specifically, login and signup are both performed without it. Personally, I won't sign up for or log in to a site that runs sensitive information over a plain-text connection. Changing the protocol manually gave me a warning that the certificate expired at the beginning of September, so maybe that's being worked on.
* "Convert your leads to customers using more effective way"
* "Protect servers repute"
* "Get rids of the duplicate emails to contain only unique addresses"
* "We offers 100 free checks while the great service"