Why does my account say 'warming up'?

In order to ensure SendFox continues to have high deliverability rates for all our users, we have an optimization system in place. 

The 'warming up' occurs on the first large send. All accounts sending to a small number of contacts will be warming up as well. 

If your emails have good stats in the first couple of hours, your emails will continue to send to the rest of your mailing list. If they don't have good stats, we optimize your email to improve your deliverability and protect your sender's reputation.

If you have any questions about this, feel free to reach out to our Support team - support@sendfox.com