A: Hi Nahidkhan,

Thanks for your interest in Mystrika.

We have heard some tools restricting addition of custom SMTP/IMAP on their warmup platform, but have yet to see anyone not allowing to send. That doesn't sound right, as a lot of small businesses use Free ESP as their business emails.

Anyways, rest assured, Mystrika has no such restrictions.

In fact, we have a free plan, with 1 free forever warmup slot.
So, our customers can test everything, be satisfied and only then take their card out. :)