How to build your own NeverBounce without getting banned?
Hi guys, in a company I work for, sometimes we spend $200 per month for validating emails in neverbounce.com (we validate all the emails for marketing campaigns before reaching new people using Intercom email marketing), so I started a prototype for email validation trough SMTP: basically I ask emails servers if the email exist, as lot of third party services do, like:
The problem is after a while we received an email from our dedicated server provider saying we got listed in UCEPROTECT and they are going to suspend our server if we don't fix the issue. We told them we are not sending spam, we are just validating if emails are valid, and it looks like some of the email servers doesn't like this kind of SMTP conversation.
So I'm wondering how these class of services work, maybe they have their own servers in collocation? Do you know what is the best VPS/server provider for this kind of services?