Emails suddenly going to spam

Immediate actions

1. Pause the campaign. Continuing to send makes it worse.
2. Check Email Accounts for mailbox errors or health warnings.
3. Look at bounce and complaint rates for the last few days.
4. Cut daily volume per mailbox roughly in half before resuming.

Then

• Clean the list and remove everything that bounced.
• Simplify the first email: one idea, one link at most, no attachments.
• Let warmup run at the reduced volume for a week before ramping again.

Important notes

Placement recovers slowly. There is no switch that restores it; consistent, low-volume, well-received sending is the only route back.