The Tomorrow Blog

Ideas on AI email, done right

Guides and opinions on AI email, IMAP, custom-domain inboxes, and workflow automation — from the team building Tomorrow.email.

AI EmailJune 22, 2026·6 min read

Why AI Email Assistants Fail for Custom-Domain Users

Most AI email assistants require a Google or Apple account, locking out anyone on a custom domain. Here is why IMAP support is the differentiator that matters.

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