Script fails to connect to the server for gmail emails and other domain ids. about verifyemail

[fzlilani]

I just checked my ip is listed in 2 blacklists. It might be the reason. But I am not sure when it was working, why it did not check other domain ids like of webart.pk

[hbattat]

I believe you have some blacklisting issue, you have to have your mail server configured correctly in order to avoid being blocked. See http://curlybrac.es/2016/07/27/how-to-configure-a-mail-server/

[harryqt]

@hbattat I have my personal mail server created using Mail-in-a-box. It has everything setup correctly.
So, if I use this method, to verify emails of gmail, yahoo or top providers, is there any chance I will get blacklisted? (I won't be checking more than 200/day)