How long to warm up email domain: what Warmy, MailReach and Smartlead say, with no schedule from Google

How long to warm up email domain: the short answer

Plan on several weeks: the vendors read on October 23, 2026, give anything from one week to twelve weeks for a new domain, and Google's sender guidelines give no schedule. Warm-up is the step-by-step rise in volume from a new domain, which tools pair with a network of mailboxes that open and answer your mail.

Warmy offers three warm-up speeds, slow at 4 to 6 weeks, medium at 2 to 4 weeks and fast at 1 to 2 weeks, on plans starting from $49 a month. Email warmup cost per month sets that price against other billing models.

What Warmy's own pages say

Warmy's pages disagree on how long a new domain needs: the warm-up product page says typically a week to a month, the calculator page says four to eight weeks, and its help center gives at least two months in one answer and between one and twelve weeks in others, while Google gives no fixed schedule.

The help center also says to wait at least 2 weeks after connecting before you send, and to keep warming afterwards.

What MailReach, Smartlead, Instantly and InboxAlly say

• MailReach: its pricing page says the initial warm-up phase should last 14 days minimum, and its blog suggests raising volume over 3 to 4 weeks.
• Smartlead: its warm-up page calls 1 to 2 months ideal for a new domain.
• Instantly: its warm-up page calls warm-up an ongoing process rather than a fixed countdown.
• InboxAlly: its pricing page says full reputation repair typically takes 4 to 8 weeks.

Each is that vendor's own guidance for its own product, so do not merge them into one schedule.

What Google and Microsoft say

Google's guidelines page names no warm-up service and gives no schedule. It says to start with a low volume to engaged users and raise it slowly, and Google's Top 10 sender issues page says raising volume too quickly can result in delivery issues.

Google's FAQ defines a new domain as one that has not sent more than 5,000 emails a day to personal Gmail accounts since January 1, 2024, and says enforcement for new domains runs on an accelerated timetable. Microsoft's Outlook.com Postmaster page says a new IP can be fully ramped within a couple of weeks or sooner. That is an IP, not a domain. Warmy's help center claims Outlook is cautious with new domains.

What sets your own timeline

Warmy's help center gives an older domain a shorter period, about 1 to 2 weeks in one article and 3 to 4 weeks in another, and several months when its reputation is bad. Daily volume sets a ceiling too: Google Workspace lists 2,000 messages a day per user account, 500 for trial accounts, and says limits can change without notice. Warmy also advises a separate domain for cold outreach.

The durations here are the vendors' own, and the pages read hold no independent study of how long warm-up takes. How to warm up a new email domain lists the steps.

Warmy's 7-day free trial covers only the first week of even its fast speed; the Warmy free trial page has the details. It runs on one mailbox, and the Terms say it converts to a paid subscription at the then-current rate unless you cancel before it ends.