1 Zapmail
Best for: Google and Microsoft mailboxes for cold email.
Zapmail sets up Google and Microsoft mailboxes and domains for cold email, with automated DNS.
Visit Zapmail (opens in a new tab)Best cold email infrastructure and warmup tools in 2026
Domains, inboxes, warmup, and list verification. Zapmail is first for Google and Microsoft mailboxes. Mailforge and Infraforge are shared and dedicated infrastructure. Warmy, Mailreach, and ZeroBounce prepare or clean what you send.
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2 Mailforge
Best for: Domains and mailboxes on shared cold-email infrastructure.
Mailforge provides cold-email domains and mailboxes on shared infrastructure, with automated DNS.
Mailforge lists $484 per month for 200 mailboxes on its homepage (checked 29 October 2026).
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3 Infraforge
Best for: Dedicated-IP mailboxes when shared infrastructure is not enough.
Infraforge provides cold-email domains and mailboxes on dedicated IPs, with automated DNS.
Infraforge lists $651 per month for 200 mailboxes on its homepage (checked 29 October 2026).
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4 Warmy
Best for: Warming mailboxes and checking inbox placement.
Warmy warms mailboxes and shows whether messages land in the inbox, spam, or promotions.
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5 Mailreach
Best for: Warming cold-email inboxes.
Mailreach warms inboxes used for cold email so a sequencer can send from them.
Visit Mailreach (opens in a new tab) -
6 ZeroBounce
Best for: Verifying a list before anyone hits send.
ZeroBounce verifies email addresses and flags invalid or risky contacts before a send.
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