# Allow some user to send email without smtp authentication

Attention

This tutorial is applicable to iRedMail-1.0 and later releases. If you're running an iRedMail-0.9.9 or earlier release, please follow this tutorial instead.

## Postfix

Open file `/etc/postfix/sender_access.pcre` (Linux/OpenBSD) or `/usr/local/etc/postfix/sender_access.pcre` (FreeBSD), append the user's email address which you're going to allow to send email without smtp authentication. We use email address `user@example.com` for example here.

    /^user@example\.com$/ OK

It's ok to use IP address instead like below if you want to allow all emails sent from this IP address:

    /^192\.168\.1\.1$/ OK
    /^192\.168\.2\./   OK
    /^172\.16\./       OK

Attention

- File `sender_access.pcre` is in pcre format, check Postfix manual page PCRE_TABLE(5) for more details.
- For more allowed sender or IP address/network format, please check Postfix manual page: access(5).

Now restart or reload postfix to make it work:

    postfix reload

## iRedAPD

iRedAPD plugin `reject_sender_login_mismatch` checks forged sender address. If sender domain is hosted on your server, but email was sent without smtp auth, it's considered as a forged email, and iRedAPD rejects this email (with rejection message: `SMTP AUTH is required for users under this sender domain`).

- To allow sending email without smtp authentication for user `user@example.com`, please add parameter `ALLOWED_FORGED_SENDERS` in iRedAPD config file `/opt/iredapd/settings.py` like below. If this parameter already exists, please append the user email address in the list.

  You can find default value and detailed comment about this parameter in file `/opt/iredapd/libs/default_settings.py`.

    ALLOWED_FORGED_SENDERS = ['user@example.com']

- To bypass sender IP address or network, for example, `192.168.0.1` and `192.168.1.0/24`, please add setting in `/opt/iredapd/settings.py` like below:

    MYNETWORKS = ['192.168.0.1', '192.168.1.0/24']

Restarting iRedAPD service is required if you updated `/opt/iredapd/settings.py`.