---
name: "qmail-newmrh"
section: "8"
platform: "linux"
package: "qmail"
version: "1.06-6.2~deb10u1"
release: "Debian 10 (Buster)"
platforms: ["linux"]
url: "https://new.carta.tech/qmail-newmrh"
---

# qmail-newmrh(8)

prepare morercpthosts for qmail-smtpd

## NAME

qmail-newmrh - prepare morercpthosts for qmail-smtpd

## SYNOPSIS

**qmail-newmrh**

## DESCRIPTION

**qmail-newmrh** reads the instructions in **/var/lib/qmail/control/morercpthosts** and writes them into **/var/lib/qmail/control/morercpthosts.cdb** in a binary format suited for quick access by **qmail-smtpd**.

If there is a problem with **control/morercpthosts**, **qmail-newmrh** complains and leaves **control/morercpthosts.cdb** alone.

**qmail-newmrh** ensures that **control/morercpthosts.cdb** is updated atomically, so **qmail-smtpd** never has to wait for **qmail-newmrh** to finish. However, **qmail-newmrh** makes no attempt to protect against two simultaneous updates of **control/morercpthosts.cdb**.

The binary **control/morercpthosts.cdb** format is portable across machines.

## SEE ALSO

[qmail-smtpd(8)](/qmail-smtpd/8.md)