Recommended tools
One short list of the tools that fix what our checkers find, with a plain reason for each. Some are partner links: if you buy, we may earn a commission at no extra cost to you.
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Instantly
Connect as many inboxes as you like, rotate sending between them and warm them up automatically. The usual starting point for cold email.
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Smartlead
Similar to Instantly, with unlimited inboxes and warm-up. Popular with agencies running campaigns for several clients.
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lemlist
Cold email with personalised images, LinkedIn steps and a built-in lead database, for teams that want multichannel sequences.
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Premium Inboxes
Google and Microsoft inboxes from $3.50 each, with SPF, DKIM and DMARC set up for you and loaded into your sending tool. You bring the domains.
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Google Workspace
The inbox provider most cold emailers start with. Pair it with Microsoft 365 inboxes to spread your sending.
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GlockApps
Sends your email to test inboxes at Gmail, Outlook, Yahoo and others and shows whether it reached the inbox, spam or nowhere.
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EasyDMARC
Turns DMARC reports into a readable dashboard, flags unknown senders and can flatten SPF to keep you under 10 lookups.
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Emailable
Checks every address before you send, so bounces stay low and your inboxes stay healthy.
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Bouncer
Email verification with a clear pay-as-you-go price. A good second opinion on catch-all addresses.
We only list tools that solve a problem our checkers find. Listing order isn’t for sale. If a tool stops being a good choice, it comes off this page.
