mailservr01
Generate an API key
Go to Settings in your mailservr dashboard and create an API key. Copy it once — you'll paste it into your password manager.
A private address, generated with the login.
Generate a unique mailservr alias every time you create a new login in Bitwarden. No context switching. Add API access when you choose Plus or Max.
Bitwarden / compatible custom-provider clients
How it works
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Configure your password manager
In Bitwarden, select SimpleLogin or Addy.io as the forwarded email service. Set the server URL to your mailservr instance and paste your API key.
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Aliases are auto-generated
When you create a new login, your password manager calls mailservr to generate a unique alias. The alias is saved with your credentials automatically.
Supported password managers
Bitwarden
Works with Bitwarden desktop, web vault, browser extension, and mobile apps. Use either SimpleLogin mode (API key only) or Addy.io mode (API key + domain selection).
✓SimpleLogin protocol (single API key)
✓Addy.io protocol (API key + domain)
✓Custom server URL support
Other clients
Compatibility requires a SimpleLogin or Addy.io mode that accepts a custom server URL. A branded integration alone is not enough.
—1Password does not currently expose a custom provider URL
—Verify custom-server support before configuring another client
Why use mailservr over SimpleLogin or Addy.io
| Feature | mailservr | SimpleLogin | Addy.io |
|---|---|---|---|
| Pricing model | Free / annual | Free / subscription | Free / subscription |
| Full inbox with threads | Yes | No | No |
| Reply from aliases | Plus / Max | Via reverse alias | Via reply/send |
| Rich text composer | Plus / Max | Forwarding-first | Forwarding-first |
| Retained attachment storage | 100 MB-10 GB | Forwarding-first | Forwarding-first |
| Bitwarden integration | Yes | Yes | Yes |
Frequently asked questions
Does mailservr work with Bitwarden?
Yes. mailservr is compatible with Bitwarden's forwarded email alias feature. Select SimpleLogin or Addy.io as the service in Bitwarden, set the server URL to your mailservr instance, and paste your API key. Aliases are generated automatically when you create new logins.
Does mailservr work with 1Password?
Not as a direct alias provider. 1Password's Masked Email feature currently uses Fastmail and does not expose a custom SimpleLogin or Addy.io server URL.
Which password managers are supported?
Bitwarden is supported through its custom SimpleLogin and Addy.io server settings. Another client can connect only if it supports one of those protocols and lets you provide a custom server URL.
Do I need a separate subscription?
Password-manager alias generation is available on Plus and Max through an API key. There are no separate integration charges.
How is this different from SimpleLogin or Addy.io?
mailservr is a self-contained email alias service with a Free inbound tier and annual Plus and Max plans. You get a full inbox with threaded conversations, search, attachments, and an API, not just forwarding.
What happens when I hit my alias limit?
The API returns an error that the password manager will display. Delete an unused alias to free total capacity, pause an active alias to switch which addresses receive mail, or upgrade for higher limits.
Private aliases from your password manager.
Set up a private alias workflow, then use an annual API-enabled plan when you need automation.