Blue Folder

CALCULATORS & GUIDES

Email calculators & guides

Five quick, free tools to figure out what your email actually costs, what's changing in 2027, and whether you'd be better off owning your mail. No sign-up — everything runs in your browser.

Cost calculator Gmail 2027 countdown Which setup fits you? Catch-all generator What can they read?

Email cost calculator

Hosted email bills you per mailbox, every month, forever. Self-hosting on your own domains is a flat cost. See the gap.

Estimates only. Self-hosting figure assumes Blue Folder Mail's ~$5/month plan ($60/yr), flat no matter how many domains or addresses you run, plus a few dollars a year for Cloudflare R2 storage. Your hosted price and mailbox count drive the comparison — adjust them to match your bill.

Pay once per month, not once per mailbox. Blue Folder Mail runs unlimited addresses across every domain you own for one flat price. See the pricing →

Gmail "Send mail as" 2027 countdown

Time left until Gmail ends "Send mail as" for custom domains.

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What's changing: From January 1, 2027, Gmail is retiring the "Send mail as" feature that let you reply from a custom address (like support@yourbusiness.com) inside a regular Gmail inbox. Who's affected: anyone running a business or personal domain through a free Gmail account instead of paid, domain-based hosting. After that date those replies go out as your @gmail.com address — or not at all.

Own your sending before then. Blue Folder Mail sends and receives as any address on any domain you control — no borrowed inbox to lose. Own your sending before then → Blue Folder Mail

Which email setup fits you?

Five questions. We'll point you to the setup that matches how you actually use email — and tell you why.

1. How many domains do you need email on?

2. Do you need to send as custom addresses (support@, you@yourdomain)?

3. How budget-sensitive are you?

4. How technical are you (DNS records, a bit of setup)?

5. How much does privacy matter?

Catch-all address generator

With a catch-all, any address at your domain lands in your inbox — even ones you've never set up. So give every signup its own address and catch the leakers.

A catch-all routes anything@yourdomain.com to you. Hand netflix@yourdomain.com to Netflix and shop@yourdomain.com to a shop. If spam starts arriving to one of them, you know exactly who sold your address — and you can block just that one.

Catch-all, built in. Blue Folder Mail gives every domain you own a catch-all and unlimited aliases — no per-address fees, no limits. Set one up → Blue Folder Mail

What can your email provider read?

Flip the switches to match your setup. We'll show, in plain language, what your provider can actually see.

I use Gmail, Outlook, or a similar free/ad-supported provider
My mail is encrypted at rest with a key only I hold (zero-access)
I send mostly to people on the same encrypted service / using PGP

Honest version: no email is magic. Subject lines, who you email, and when (metadata) are visible to your provider almost everywhere, because mail has to be routed. The big difference is the body: a standard provider can read it; a zero-access provider stores only ciphertext it can't open.

Zero-access by design. Blue Folder Mail encrypts your stored mail with a key derived from your password — the server keeps ciphertext it cannot read, and neither can we. See how it works → Blue Folder Mail