Articles about postfix | UserComp.com

Stop Postfix Sending Mail to Recipient Outside Domain

Learn how to configure Postfix to only send emails within the local domain.

Solving Postfix Newbie Issue: TLS 1.2 Ciphers Get Synology MailPlus Server to Accept SMTP Connection on Lorex DVR

Having trouble sending email notifications from Lorex DVR using Synology NAS MailPlus Server due to TLS connection failure? This guide focuses on solving the issue by updating the TLS 1.2 ciphers on the Synology MailPlus Server.

Retrieving Emails on Fedora Dovecot Postfix Homeserver

This article guides you through the process of retrieving emails on a Fedora Dovecot Postfix homeserver, focusing on setting up a standard email account with Libero.it. Let's get started!

Fixing Debian Postfix, Dovecot, and SpamAssassin: External Emails Not Accepted But Outgoing Mails Sent

Having trouble with your Debian email server using Postfix, Dovecot, and SpamAssassin? You may find that external emails are not being accepted, but outgoing mails are being sent. This issue might be related to incorrect parameter settings. Despite your server not being an open relay, you suspect there is a problem with the configuration. Read on to learn how to resolve this common tech support problem and optimize your email server for smooth operation.

Fixing Debian Postfix, Dovecot, and SpamAssassin: External Emails Not Accepted, Outside Addresses Not Sent

Having trouble sending external emails or accepting incoming ones on your Debian server running Postfix, Dovecot, and SpamAssassin? Despite your best knowledge, your server isn't an open relay. Read more to learn how to tackle this likely parameter order issue.

Restricting SASL Accounts by IP Addresses in Postfix on Ubuntu 22.04

Learn how to restrict access to specific SASL accounts in Postfix based on IP addresses. This tutorial covers the steps for a small mail server running Ubuntu 22.04 with 10 allowed accounts. Follow the instructions to secure your email system.

Troubleshooting Email Issues with Local Postfix Email Server Setup

Having issues setting up a local Postfix email server with Dovecot? This article covers common issues, including incoming ports open in the firewall and enabled protocols (SMTP, IMAP). Learn how to optimize your email server for SEO and invite your audience to read more on our tech support site.

Postfix Sender Client Access Restrictions Not Working for Subdomains

In this article, we will discuss why Postfix sender client access restrictions are not working for subdomains in Postfix 3.7.11 Debian 12. We will provide a solution to this problem.

Troubleshooting Postfix: Emails Not Sending from Localhost

Having trouble sending emails from Postfix on localhost? Learn about the common causes and how to resolve them. Check your main.cf configuration and ensure your email is set up correctly.

Understanding SMTP Server Limits for Direct Email Relays with Postfix

Learn about SMTP server limits when setting up a Gmail relay mail server as the final destination, not another relay, and how Postfix can help. This SEO-optimized abstract introduces the topic of SMTP server limits and direct email relays using Postfix.

Migrating RHEL 6 Email Server to RHEL 9: Installing Postfix with MySQL Client

Learn how to install and configure Postfix email server with MySQL client on a new RHEL 9 server during the migration process from an old RHEL 6 server.

Postfix Mail Server Installation Fails to Send Emails to Gmail, Works with ProtonMail: TLS Issue Solution

This article provides a solution to an issue where Postfix Mail Server fails to send emails to Gmail but works with ProtonMail, which is caused by a TLS issue. Learn how to resolve this problem and successfully send emails from Postfix Mail Server to Gmail.

Understanding Postfix Milter Use in Tech Support

Learn about Postfix Milter use in tech support, including its format and implementation.

Postfix, Node.js, and SMTP: Receiving Emails with a Custom Domain

Learn how to set up Postfix Smtp server to receive emails using Node.js and a custom domain.

Postfix: Deleting Old Emails on a VPS with Ubuntu and POP

Learn how to configure Postfix on a Ubuntu VPS to delete old emails using POP. This tutorial covers Postfix, Dovecot, and SpamAssassin.

Handling Email Delivery with Dynamic IP Addresses on Ubuntu Server using Postfix

Learn how to handle email delivery on a Ubuntu server with a dynamic IP address using Postfix. This includes setting up DNS records and configuring Postfix to adapt to IP address changes.

Understanding Postfix Lookup Table in Tech Support

When trying to send mail locally using Postfix, the concept of a lookup table might come up during troubleshooting. In this article, we'll discuss what a Postfix lookup table is and how it's used.

Postfix with OpenSSL 3: Auto DH Parameters

This article explains how to configure Postfix to use OpenSSL 3's auto DH parameters.

Postfix 3.7 and OpenSSL 3: Configuring DH Parameters

This article explains how to configure DH parameters in Postfix 3.7 when using OpenSSL 3.0.0 or later.

Configuring Postfix Mail Server for Multiple Domains: SPF, DKIM, and DMARC

In this article, we will guide you through the process of configuring Postfix mail server to support multiple domains using SPF, DKIM, and DMARC. We will also cover the importance of setting up reverse DNS for each domain.

Correctly Using Postfix Virtual Aliases for Email Routing

In this tech support article, we will guide you on how to correctly use Postfix virtual aliases to route emails to specific user accounts. We will cover the process of editing the virtual file in Postfix to set up email forwarding for a specific domain and username.

Automatically Deleted Postfix Emails: Ubuntu Server Troubleshooting

Having issues with Postfix on Ubuntu Server where emails are being automatically deleted? Learn how to troubleshoot and resolve the problem. Read more for a detailed tech support guide.

Let postfix reject unauthenticated emails from my own domain

Learn how to configure Postfix to reject unauthenticated emails from your own domain on a Linux system. This article provides step-by-step instructions and tips to enhance email security.

How to Set Up DNS for a Local Email Server with an SMTP Relay

Learn how to configure DNS settings for a local email server and set up an SMTP relay for seamless email communication. This article provides step-by-step instructions and best practices to ensure smooth operation of your email server.

Using Postfix: How to Replace Sender Address with a Specific Value

Learn how to use Postfix to replace the sender address with a specific value based on the destination address. This article provides step-by-step instructions for configuring Postfix to customize the sender address for outgoing emails.

Postfix Performance Issues: Troubleshooting Slow and IO Hog Problems

Learn how to address performance issues with Postfix, a popular mail transfer agent. This article focuses on troubleshooting slow and IO hog problems that can impact the efficiency of your email server.

Change Postfix Sender Envelope MAIL FROM Address To Match Return Path Header Email For Multiple Domains

Learn how to change the Postfix sender envelope MAIL FROM address to match the return path header email for multiple domains. This article provides step-by-step instructions and tips for optimizing your email configuration.

Postfix Bouncing Valid Emails: How to Troubleshoot and Resolve the Issue

Learn how to troubleshoot and resolve the issue of Postfix bouncing valid emails. This article provides step-by-step instructions and tips to help you fix the problem and ensure successful email delivery.

Web Based Email Client for Postfix: How to Access Your Postfix Emails Online

Learn how to access your Postfix emails online with a web-based email client. This article provides step-by-step instructions on setting up and using a web-based email client for Postfix, allowing you to conveniently manage your emails from any device with an internet connection.

How to Route Mail through a WireGuard Tunnel for Self-Hosted Domains

Learn how to route (send) mail through a WireGuard tunnel when sending email from one of your self-hosted domains. This article provides step-by-step instructions for configuring WireGuard on Ubuntu, setting up Postfix, and using pfsense for tunneling. Start securing your email communications today!

Troubleshooting Postfix: Local Delivery despite External Agent Configuration

Learn how to troubleshoot and resolve the issue of Postfix delivering messages locally instead of using an external agent. This article explores the configuration settings related to email delivery, DNS, SMTP, and Postfix, providing step-by-step instructions to address the problem.

Troubleshooting Postfix Log Rotation: Empty maillog_file

Learn how to troubleshoot the issue of an empty maillog_file after log rotation in Postfix. This article provides step-by-step instructions and tips to resolve the problem and ensure proper logging in your Postfix setup.