Hal  Sauer

Hal Sauer

1591413206

How to Set Up Postfix SMTP Relay on Debian with Mailjet

This tutorial is going to show you how to set up Postfix SMTP relay with Mailjet on Debian. Postfix is a popular open-source SMTP server. Previously I wrote an article how to quickly set up your own email server on Debian with Modoboa, which helped a lot of readers run their own email server.

However, some readers told me that port 25 is blocked by hosting provider or ISP as a way to control email spam, so they couldn’t send email. Vultr would unblock port 25 if you ask them to, and Hostwinds doesn’t block port 25 at all, so I recommend using Hostwinds VPS. Some other hosting providers or ISPs like DigitalOcean would not unblock port 25, so what can you do to bypass this blocking, if you can’t or don’t want to change your hosting provider?

#debian #debian server #linux #mailjet #postfix #smtp relay

What is GEEK

Buddha Community

How to Set Up Postfix SMTP Relay on Debian with Mailjet
Hal  Sauer

Hal Sauer

1591413206

How to Set Up Postfix SMTP Relay on Debian with Mailjet

This tutorial is going to show you how to set up Postfix SMTP relay with Mailjet on Debian. Postfix is a popular open-source SMTP server. Previously I wrote an article how to quickly set up your own email server on Debian with Modoboa, which helped a lot of readers run their own email server.

However, some readers told me that port 25 is blocked by hosting provider or ISP as a way to control email spam, so they couldn’t send email. Vultr would unblock port 25 if you ask them to, and Hostwinds doesn’t block port 25 at all, so I recommend using Hostwinds VPS. Some other hosting providers or ISPs like DigitalOcean would not unblock port 25, so what can you do to bypass this blocking, if you can’t or don’t want to change your hosting provider?

#debian #debian server #linux #mailjet #postfix #smtp relay

Linux Tutorial

1604981708

Set Up SMTP Relay Between 2 Postfix SMTP Servers on CentOS/RHEL

Previously we discussed setting up Postfix SMTP relay with mailjet, which is useful when you have to use a commercial SMTP relay service. This tutorial will be showing you how to set up SMTP relay between 2 Postfix SMTP servers on CentOS/RHEL.

Use Case

Let’s say there are two servers: server A and server B.

  • You have set up a full-featured mail server on server A with Postfix as the SMTP server. You can use it to send emails directly to recipients, because port 25 isn’t blocked.

  • Later you use server B to set up a website, which needs to send notification emails to users.

You can set up another mail server on server B, but it’s a waste of time and hardware resources. A more sensible solution is to install Postfix SMTP server on server B and configure it to send emails via server A, which can relay emails from server B to the final recipients. Server A has built up its IP reputation, so you don’t have to build IP reputation for server B.

If you run WordPress on your own Linux server, I recommend you follow this tutorial to set up Postfix SMTP relay. This way, you can get rid of SMTP plugins in WordPress. WordPress plugins slow down your site and they can be vulnerable, such as the vulnerability found in the Easy WP SMTP plugin, which allows unauthorized users to modify WordPress options and execute malicious code. My site has been compromised once, because of a vulnerability in WordPress plugin. So I get rid of as many plugins as I can, when I can implement the same functionality with the underlying operating system.

Without further ado, let’s get started.

#mail server #smtp relay #centos #linux

How to Setup a Complete Mail Server (Postfix) using 'Roundcube' (Webmail) on Ubuntu/Debian

Creating a mail server on Linux powered machines can be one of the most essential things that every system administrator needs to do while configuring the servers for the first time, if you don’t know what it means; it’s simple, if you have a website like “example.com”, you can create an email account like “username@example.com” to use it to send/receive emails easily instead of using services like HotmailGmailYahoo Mail, etc.

In this article, we’ll learn how to do so by installing the Postfix mail server with the “Roundcube” webmail application and its dependencies on Debian 10/9 and Ubuntu 20.04/18.04/16.04 LTS releases.

#debian #postfix mail server #ubuntu #dovecot #postfix #squirrelmail

Hal  Sauer

Hal Sauer

1591475400

Set Up Your Own DNS Resolver on Debian 10 Buster with BIND9

This tutorial will be showing you how to set up a local DNS resolver on Debian 10 Buster, with the widely-used BIND9 DNS software. There are many synonyms for DNS resolver, some of which are listed below. They all refer to the same thing.

#debian #bind9 #debian desktop #debian server #dns resolver #linux

How To Install PHP 8.0 on Debian 10 / Debian 9

PHP is an open-source programming language used for web development, created by Rasmus Lerdorf in 1994. It is an HTML-embedded scripting language for creating dynamic websites such as blogs, internet forums, e-commerce portals, etc.

In this post, we will see how to install PHP 8.0 on  Debian 10 /  Debian 9.

Add PHP Repository

SURY, a third-party repository that offers PHP 8.0/7.x for the Debian operating system. Update the repository cache.

sudo apt update

Install the below packages.

sudo apt install -y curl wget gnupg2 ca-certificates lsb-release apt-transport-https

#debian #post #debian 10 #debian 9 #php