Sysadmin tips
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Sysadmin tips
Tips and Tricks that we have to know and abuse every day. sysadmin, sysops and network.
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Remove mail from Mailq from a specific user

Remove mail from Mailq from a specific user | Sysadmin tips | Scoop.it

mailq | awk '$7 ~/^username@domain.tld$/ { print $1 }' | tr -d '*!' | postsuper -d -

stephane gault's insight:

Very intresting way of getting rid of some useless or bugged mail in a long postfix queue.

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Installing and running Postfix within a docker container from the com…

Installing and running Postfix within a docker container from the command line
stephane gault's insight:

Intresting start to docker postfix (fine if you want to have different postfix on the same host).

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Home of Sysadmin & Sysops tips and tricks

Home of Sysadmin & Sysops tips and tricks | Sysadmin tips | Scoop.it

Commands, tips, network config, bigdata, performance tweaking, all you need to know.

stephane gault's insight:

MySQL, Percona, HAproxy, Nginx, Zsh, Cassandra, Hadoop, Memcached, Redis, ElasticSearch, Postfix, OpenDKIM, etc ...

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Configure Postfix for Multiple ISP Client SMTP Authentication

Configure Postfix for Multiple ISP Client SMTP Authentication | Sysadmin tips | Scoop.it

This article outlines the steps required to configure Postfix to relay email through multiple ISP or mail providers depending on the source address.

stephane gault's insight:

Relaying mails to different relay SMTP with postfix, based on sender or domain, using sender_dependent_relayhost_maps.

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Installing OpenDKIM with Postfix or Sendmail (for RHEL / CentOS / Fedora)

Installing OpenDKIM with Postfix or Sendmail (for RHEL / CentOS / Fedora) | Sysadmin tips | Scoop.it
For those who want or need to compile and install OpenDKIM from the source code, you can follow the instructions I wrote in this article. If you're looking for the fastest and easiest way to get Op...
stephane gault's insight:

Good howto to get your outgoing mails signed with opendkim, with all the spf reminder.

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