Limits & fair use

Real correspondence — you and the people you write to. Personal mail, project mail, small business mail. That’s the whole product, and keeping it to that is exactly why your mail lands in inboxes instead of spam folders.

• Up to 100 messages per hour, per mailbox.
• Up to 500 messages queued at once, per mailbox.
• 2 GB attachment-inclusive message size ceiling.
• 10 GB mailbox storage.

Approaching a limit, you’ll get a heads-up. Going over briefly, we’ll slow you down (defer), never bounce your mail — a deferred message keeps retrying and gets through; a bounced one is lost. These numbers grow as MailHow leaves beta.

To protect the shared sending reputation, MailHow is not for:

• Spam or any unsolicited email.
• Marketing, advertising, or promotional bulk email.
• Running a mailing list or newsletter blast. (Subscribing to and replying to lists is fine.)
• “Warming up” a domain or sending reputation — there are dedicated services for that; we are not one.
• Phishing, malware, or anything illegal.

Light transactional mail to your own customers (receipts, confirmations) within the limits above is fine. If you need to send at volume, use a dedicated bulk/transactional provider — that’s a different job than a mailbox.

We watch for abuse and scan outbound mail. Accounts that endanger the platform or other users’ deliverability can be suspended immediately, and serious violations of these terms can lead to termination without refund. On a shared platform, one abuser hurts everyone — so we’re strict about this on purpose. Full terms are in the Terms of Service.