PostagePostage vs Mimestream
Checked October 29, 2026
Both are native Mac email apps. Mimestream is built for Gmail only and sold as a subscription ($4.99 a month or $49.99 a year). Postage works with Gmail and any other IMAP account, has a built-in MCP server so Claude, Codex and other agents can work in your mail, and is $39 once.
At a glance
| Postage | Mimestream | |
|---|---|---|
| Accounts | Gmail, iCloud, Fastmail, Yahoo, your own domain, any IMAP | Gmail ("All your Google accounts") |
| How it connects | IMAP and SMTP over TLS | The Gmail API, directly |
| AI agents (MCP) | Built-in MCP server, setup for eight agent apps | Not listed on its site |
| Price | $39 once | $4.99 a month or $49.99 a year |
| One-time purchase | Yes | No, subscription only |
| Requires | macOS 14 Sonoma | macOS 12 Monterey |
Where Mimestream is the better fit
If every account you have is Gmail and you want Gmail's own features (labels, categories, filters) handled through the Gmail API, Mimestream is built exactly for that. It also runs on older Macs: macOS 12 and later.
Where Postage is the better fit
- You have more than Gmail. iCloud, Fastmail, Yahoo, a work domain: all in one inbox next to Gmail.
- You use AI agents. Claude Code, Claude Desktop, Codex, Cursor and others connect to Postage's local MCP server with the accounts they already have. They read, sort and draft; you press Send.
- You'd rather pay once. $39, updates included, no renewal.
Questions
Does Postage support Gmail labels?
Postage uses IMAP, where Gmail shows labels as folders. You can move mail between them, and agents can file mail into them.
Can I use both?
Yes. Both connect to Gmail directly, so the same mail shows up in each.
Get Postage
A fast, native Mac email client with the MCP server built in. $39 once, no subscription.
One-time purchase, no subscription. Notarized by Apple. macOS 14 Sonoma or later.