How-to guides

How to authenticate, warm up and test a sending domain

Step-by-step help for authenticating a new sending domain, ramping volume, reading Postmaster data and deciding whether a warm-up tool is needed.

Warm up a new domain in a safe order and know when a tool would help.

2 practical guides

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Start here · Practical guide

How to warm up a new email domain: the order of steps, how long it takes and when a tool helps

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Guide preview

Authenticate first, start with low volume to people who want your mail, raise it in steps and watch complaints. How long it takes and when a tool helps.

Bottom line: Authenticate the domain first, then send a few messages a day to people who want them and raise volume in steps while spam complaints stay low. Google gives no fixed schedule, so the four-to-eight-week plans on vendor pages are rules of thumb. A paid warm-up network is optional, and its value is disputed.

Practical guide

What is Warmy? An email warm-up and deliverability service explained

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Guide preview

What Warmy (warmy.io) is, how its email warm-up works, what else the service includes and where warm-up has limits, read from vendor and platform pages.

Bottom line: Warmy is a subscription service at warmy.io that warms up and monitors email sending. It links your mailbox to a network of other mailboxes that open, reply to and rescue your messages, and adds placement tests and authentication monitoring. It does not replace correct SPF, DKIM and DMARC setup.