Warming Up New Email Addresses

Note: there is an ongoing debate within the community about whether or not Gmail and Outlook have gotten smarter about detecting warm-ups. So proceed with caution.

You can "warm up" new email accounts to boost deliverability by using Warmbox or Inbox Warmup.

Warm-ups will start sending emails on your behalf to dummy inboxes. Then those dummy inboxes will reply to those emails, creating a feeling of valid emails occurring from your email address.