How Long to Warm Up a Cold Email Domain, Step by Step

Why a mailbox needs warming

Mailbox providers watch how new senders behave. A new address that suddenly sends hundreds of emails looks like abuse. A steady, small, human pattern builds trust.

A simple schedule

What to watch

Check bounces and spam complaints each day. If bounces pass 2%, pause and clean the list. Replies are the best signal that the mailbox is healthy.

What not to do

Do not use bought lists to warm up, send the same text to everyone, or hide who you are. Use real mailboxes with real names.

A worked example

A founder starts on Monday with a new subdomain. Days 1 to 3 she sends ten emails a day to people who are likely to answer, such as past colleagues and people she has already spoken to. On day 4 she moves to twenty. By day 8 she is at thirty a day to the first real list, and by day 11 at forty. She checks bounces every morning and pauses for a day when one address bounces twice in a row.

Common mistakes

• Starting at 100 a day because the tool allows it.
• Warming up with one list and then switching to a very different audience.
• Ignoring replies. A reply is the best sign the mailbox is trusted, so answer each one quickly.
• Changing the subject line and the text every day, which makes it hard to learn what works.

Where Touchbase fits

Touchbase finds companies that fit what you sell, says why each one fits, writes a plain first email for each that you approve before anything is sent, and handles replies and follow-ups. You choose who to write to and what goes out.