Kerjamail, a popular web-hosting service, has been recently blacklisted! 

Reasons vary from multiple hard bounces due to poor email list hygiene to frequent spam complaints. 

Common Effects of Blacklisting: A further surge in bounce rate, damage to brand reputation resulting in a dip in open rates, and emails landing into spam folders.

Don't let the same happen to you.
Know more about email blacklisting and how to avoid it - Read Here