mailpit

Options

services.mailpit.enable

Whether to enable mailpit process.

Type: boolean

Default:

false

Example:

true

Declared by:

• https://github.com/cachix/devenv/blob/main/src/modules/services/mailpit.nix

services.mailpit.package

Which package of mailpit to use

Type: package

Default:

pkgs.mailpit

Declared by:

• https://github.com/cachix/devenv/blob/main/src/modules/services/mailpit.nix

services.mailpit.additionalArgs

Additional arguments passed to mailpit.

Type: list of strings concatenated with “\n”

Default:

[ ]

Example:

[
  "--max=500"
]

Declared by:

• https://github.com/cachix/devenv/blob/main/src/modules/services/mailpit.nix

services.mailpit.smtpListenAddress

Listen address for SMTP.

Either \<host\>:\<port\>, where the port is the base devenv allocates from, or a unix socket as unix:\<path\>:\<permissions\>, which is passed to mailpit as given. Mailpit requires the permissions.

Type: string

Default:

"127.0.0.1:1025"

Example:

"unix:${config.env.DEVENV_RUNTIME}/mailpit-smtp.sock:660"

Declared by:

• https://github.com/cachix/devenv/blob/main/src/modules/services/mailpit.nix

services.mailpit.uiListenAddress

Listen address for UI.

Either \<host\>:\<port\>, where the port is the base devenv allocates from, or a unix socket as unix:\<path\>:\<permissions\>, which is passed to mailpit as given. Mailpit requires the permissions.

Type: string

Default:

"127.0.0.1:8025"

Example:

"unix:${config.env.DEVENV_RUNTIME}/mailpit-ui.sock:660"

Declared by:

• https://github.com/cachix/devenv/blob/main/src/modules/services/mailpit.nix

Last updated Oct 11, 2026