I have been using WarmySender for the last 45 days. In my honest opinion, the tool is not good enough. I bought their Tier 2 plan, and I had all of my inboxes ready and warmed up those leads for 6 weeks.

However, when I run campaigns, they suddenly get paused due to high bounce rates—spiking to over 30%. Interestingly, these are the exact same leads that I have successfully used to run campaigns on other platforms like ManyReach and Saleslink without these problems.

For example, out of my last 300 prospects, only 5 or 6 went through and the rest all bounced. I manually checked those email addresses, sent messages successfully from my regular inboxes, and even ran them through their built-in email verifier, which incorrectly flagged active personal and B2B emails as invalid.

Given these ongoing issues with bounce tracking and verification accuracy, I cannot recommend WarmySender.