Zoho CRM Email Not Syncing (IMAP/Gmail)
Quick answer
IMAP/POP3 sync breaks after password or OAuth changes, Gmail transfer limits, or an address already linked to another CRM account. Re-authenticate and verify the server details in another client.
Most likely fix: Reconfigure the mailbox
How to fix it
Try these in order — the most common fix is first.
1. Reconfigure the mailbox
- Go to CRM Setup and open the email configuration (Channels > Email)
- Update the password in both the IMAP/POP3 and outgoing server settings
- Re-authorize if OAuth errors show
Did this fix it?2. Test the server details elsewhere
- Set up the same IMAP/POP3 details in Outlook or Thunderbird
- If it fails there too, the problem is the mailbox or provider, not CRM
Did this fix it?3. Resolve 'already configured'
- An admin can remove the address from the Zoho Mail Add-on Users page in CRM Settings
- Then configure it again under the right account
Did this fix it?4. Reduce connections and volume
- Close unneeded IMAP connections
- Avoid large initial syncs that hit Gmail's 2.5 GB/day cap
Did this fix it?
Symptoms
Emails from Gmail or another mailbox don't appear on CRM records, or sending from CRM fails.
Why it happens
- Password changed but not updated in IMAP and outgoing server details
- OAuth/modern authentication errors with Gmail
- Gmail limits IMAP/POP3 transfers to 2.5 GB per day
- Address already configured in another CRM account
- Too many IMAP connections open
- Two-factor authentication on the mailbox
This guide also covers
- zoho crm email not syncing
- zoho crm imap not working
- zoho crm gmail integration not working
- zoho crm cannot send email
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