ZOHO email policy explained
ZOHO Mail explicitly prohibits several types of email activities, including "promotional emails, bulk emails, marketing emails, newsletters, automated emails, and transactional emails."
While our warmup service is designed to be legitimate, ZOHO's systems often flag the regular, patterned sending as "unusual activity," which triggers automatic blocks.
ZOHO also monitors for "sending a large number of emails within a short span of time" and "sending to a large number of recipients on a single day."
These two patterns match our warmup behavior, which can sometimes affect our warmup service. What can happen is that your inbox suddenly stops sending emails, despite having everything configured correctly.
How to avoid this from happening
Once you connect your ZOHO inbox to Warmup Inbox, we recommend that you set up the sending frequency settings accordingly:
Start with minimal volume (1-2 emails/day)
Use the slowest possible ramp-up (1 per day)
Use highly personalized templates
Regularly monitor your inbox
How to fix if your inbox suddenly stops sending the warmup emails
We´re very sorry if this happens to your inbox! If your inbox was running without any error, but suddenly stops sending the warmup emails, it means that ZOHO most likely temporarily blocked your account. Here are the steps on how to resolve this:
Go to UnBlock Me page in your ZOHO account to check if you´re blocked.
If you find yourself blocked, manually unblock your account.
Reduce your warmup settings significantly:
Lower starting baseline to 1-2 emails/day
Reduce the increase rate to 1 per day maximum
Consider using a custom template that appears more personal
If the warmup remains critical, you may consider using an alternative ESP
Alternative solution
For automated and high-volume email activity, ZOHO recommends using their ZeptoMail service.