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# Complex routing

## Introduction

`Sendmail` routes mail using the domain of the recipient. If this resolves to this machine (local user), `Sendmail` uses the user's name to finish the job. Sometime, the decision should be done using both the user's name and destination domain as a whole.

## 1. Principles

## 2. Task

- 2.1 This rule is active
- 2.2 to
- 2.3 Rewritten to
- 2.4 Forward to server(opt)
- 2.5 Mailer
- 2.6 Comment

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