Protecting your Gmail sender reputation during outreach

Your mailbox reputation is the single biggest factor in whether cold emails land in the inbox or in spam. It's slow to build and quick to lose.

Start slow

New mailboxes should send a small number of emails per day and grow gradually. AceMail's warmup toggle keeps volume low while your mailbox earns trust.

Set hourly and daily limits

Sudden bursts look robotic. Spreading sends across the day with per-hour and per-day caps looks like a real person writing emails.

Clean your lists

Bounces hurt. Verify addresses before importing, and remove contacts who ask to stop hearing from you.

Watch mailbox health

Keep an eye on failed sends and reconnect warnings on the Mailboxes page — they're the early signal that something needs attention.