Email Servers
Postfix, Dovecot, and email server configuration.
70 articles
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Email Server IP Reputation and Blacklist Monitoring
Learn how to set up and configure reputation on your VPS with step-by-step instructions, including blacklist and best practices for production environments.
112 views
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Let's Encrypt SSL for Mail Services
Everything you need to know about letsencrypt for your VPS, from initial setup to production-ready configuration with ssl.
116 views
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Stalwart JMAP Mail Server Installation
Learn how to set up and configure stalwart on your VPS with step-by-step instructions, including jmap and best practices for production environments.
151 views
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Setting Up Roundcube Webmail on VPS
Step-by-step tutorial for roundcube on Ubuntu/Debian servers, with practical code examples and troubleshooting tips.
117 views
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Postfix Queue Management and Troubleshooting
Learn how to set up and configure postfix on your VPS with step-by-step instructions, including queue and best practices for production environments.
117 views
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Troubleshooting Email Delivery Issues
Step-by-step tutorial for delivery on Ubuntu/Debian servers, with practical code examples and troubleshooting tips.
119 views
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Email Greylisting with Postgrey
Guide to implementing email greylisting with Postgrey for Postfix, covering configuration, whitelisting, tuning, monitoring, and integration with Rspamd.
489 views
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Fetchmail for Remote Email Collection
Guide to using Fetchmail for collecting email from remote POP3 and IMAP servers, with multi-account configuration, Gmail setup, and Postfix delivery integration.
391 views
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Troubleshooting 550 Relay Access Denied Errors
Comprehensive troubleshooting guide for 550 Relay Access Denied errors in Postfix, covering authentication setup, network configuration, restriction ordering, and debugging.
762 views
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Mox: Modern Go-Based Mail Server
Guide to deploying Mox, a modern Go-based mail server with SMTP, IMAP, webmail, DANE, MTA-STS, and automatic TLS in a single binary.
248 views
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Email Bounce Codes Explained
Complete reference guide to SMTP bounce codes and enhanced status codes, with provider-specific errors, resolution steps, and bounce handling best practices.
912 views
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Haraka: High-Performance Node.js SMTP Server
Guide to deploying Haraka high-performance SMTP server with Node.js, covering plugin configuration, DKIM signing, rate limiting, and custom plugin development.
234 views
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Testing Email Configuration with swaks
Comprehensive guide to using swaks (Swiss Army Knife for SMTP) for testing email server TLS, authentication, DKIM, spam filters, and debugging SMTP conversations.
699 views
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Email Autoresponders with Postfix
Guide to implementing email autoresponders with Postfix using vacation, Sieve filters, and custom Python scripts with rate limiting and loop prevention.
529 views
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Migrating Email Between Servers with imapsync
Guide to migrating email between IMAP servers using imapsync, with bulk migration scripts, provider-specific configurations, incremental sync, and validation.
537 views
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Poste.io: All-in-One Docker Mail Server
Guide to deploying Poste.io as an all-in-one Docker mail server with SMTP, IMAP, webmail, antivirus, spam filtering, and automatic TLS certificates.
462 views
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Postfix Virtual Domains and Users
Guide to configuring Postfix virtual domains and users with file-based and MySQL-backed lookups, Dovecot IMAP integration, and quota management.
739 views
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Server-Side Email Rules with Sieve Filters
Guide to Sieve email filtering with Dovecot ManageSieve for server-side rules, vacation auto-replies, spam sorting, forwarding, and practical filter recipes.
349 views
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Monitoring and Managing the Postfix Mail Queue
Guide to monitoring, managing, and troubleshooting the Postfix mail queue with commands for analysis, bulk operations, alerting, and performance tuning.
584 views
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Implementing ARC for Email Forwarding Chains
Guide to implementing ARC (Authenticated Received Chain) for email forwarding with OpenARC and Rspamd to preserve authentication through forwarding chains.
335 views
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Postfix Rate Limiting and Throttling
Guide to Postfix rate limiting for outbound throttling, inbound connection limits, per-user restrictions, IP warm-up schedules, and policy daemon integration.
609 views
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Setting Up Mail-in-a-Box: Complete Mail Server
Complete guide to deploying Mail-in-a-Box for self-hosted email with SMTP, IMAP, webmail, spam filtering, DKIM, SPF, and automatic TLS certificates.
898 views
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Maddy: Lightweight All-in-One Email Server
Guide to deploying Maddy, a lightweight all-in-one email server in Go with SMTP, IMAP, DKIM, SPF, and DMARC in a single binary.
436 views
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Rspamd with Redis for Advanced Spam Filtering
Guide to deploying Rspamd with Redis for high-performance spam filtering with machine learning, DKIM signing, greylisting, and Postfix integration.
711 views
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Email Archiving with MailArchiva
Guide to email archiving with MailArchiva and Postfix for compliance, legal discovery, and organizational knowledge preservation with search and retention policies.
524 views
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Troubleshooting DKIM Failures
Comprehensive troubleshooting guide for DKIM failures covering body hash mismatches, DNS record issues, key rotation, canonicalization, and multi-domain signing.
578 views
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Email Migration Between Servers with imapsync
Practical guide to imapsync featuring real-world examples, performance tuning tips, and security best practices.
116 views
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Maddy All-in-One Mail Server Setup
A comprehensive guide to maddy covering installation, configuration, and optimization for Linux VPS environments.
116 views
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Postfix and Dovecot Complete Mail Server Setup
Everything you need to know about postfix for your VPS, from initial setup to production-ready configuration with dovecot.
112 views
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How to Set Up a Catch-All Email Address with Postfix
How to Set Up a Catch-All Email Address with Postfix A catch-all email address receives every message sent to your domain that does not match an existing mai...
135 views
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How to Configure Email Forwarding with Postfix
How to Configure Email Forwarding with Postfix Email forwarding allows you to redirect messages from one address to another without requiring the sender to k...
137 views
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How to Set Up Roundcube Webmail on Your Breeze
How to Set Up Roundcube Webmail on Your Breeze Roundcube is a feature-rich, open-source webmail client that provides a modern browser-based interface for rea...
135 views
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How to Troubleshoot Email Delivery Issues
How to Troubleshoot Email Delivery Issues Email delivery problems are among the most common issues on self-hosted mail servers. Whether messages are bouncing...
131 views
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How to Set Up Email Alerts for Server Events
How to Set Up Email Alerts for Server Events Proactive email alerting ensures you know about critical server events before they escalate into outages. On you...
137 views
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How to Set Up Mailu All-in-One Email Server
What Is Mailu?Mailu is an open-source, Docker-based email server suite that bundles SMTP, IMAP, webmail, antivirus, and antispam into a cohesive system. It p...
145 views
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How to Set Up Postal SMTP Server on Linux
What Is Postal?Postal is an open-source mail delivery platform designed for sending transactional and bulk emails. It provides a web interface for tracking d...
142 views
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How to Configure Email Relay with SendGrid
Why Use an Email Relay?Sending email directly from a Breeze can result in deliverability issues due to shared IP reputation. Configuring an SMTP relay servic...
131 views
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How to Set Up iRedMail Email Server
What Is iRedMail?iRedMail is a free, open-source mail server solution that automatically installs and configures Postfix, Dovecot, SpamAssassin, ClamAV, and ...
136 views
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How to Configure Rspamd Spam Filter
What Is Rspamd?Rspamd is a fast, advanced spam filtering system that uses multiple detection methods including Bayesian filtering, neural networks, fuzzy has...
137 views
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Configuring SMTP Rate Limiting to Prevent Abuse
Practical guide to rate-limiting featuring real-world examples, performance tuning tips, and security best practices.
114 views
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Understanding Email Headers and Message Flow
224 views
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How to Debug Email Delivery Issues
177 views
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Setting Up Roundcube Webmail on Your Server
247 views
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Understanding Email Deliverability and Reputation
177 views
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Setting Up Dovecot IMAP Server on Linux
156 views
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Configuring Postfix as a Send-Only Mail Server
315 views
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How to Set Up DKIM with OpenDKIM on Ubuntu
146 views
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Configuring SPF Records for Your Mail Server
314 views
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Setting Up DMARC Records for Email Authentication
257 views
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Postfix Mail Queue Management Commands
335 views
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Understanding Email Headers for Troubleshooting
140 views
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Setting Up Email Forwarding and Aliases
133 views
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Troubleshooting Email Delivery Issues
139 views
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Setting Up Postfix as a Send-Only Mail Server
131 views
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Configuring Dovecot for IMAP Email Access
143 views
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Fighting Spam with SpamAssassin
137 views
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Setting Up a Complete Mail Server with Mailcow
129 views
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Email Deliverability Best Practices
159 views
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How to Install Postfix on Ubuntu
Postfix is a popular, secure mail transfer agent (MTA) for sending emails from your server.Installapt update\napt install postfix -ySelect "Internet Site" when ...
427 views
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How to Set Up SPF, DKIM, and DMARC Records
Email authentication records prevent your emails from being marked as spam.SPF RecordAdd a TXT record to your DNS:v=spf1 ip4:YOUR_IP a mx ~allDKIMInstall OpenDK...
609 views
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How to Install Dovecot for IMAP and POP3
Dovecot handles incoming email retrieval via IMAP and POP3 protocols.Installapt install dovecot-imapd dovecot-pop3d -yBasic ConfigurationEdit /etc/dovecot/dovec...
589 views
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How to Send Email from the Command Line
Send test emails or notifications directly from your server.Using mail Commandapt install mailutils -y\necho "Email body" | mail -s "Subject" recipient@example....
621 views
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How to Set Up Email Forwarding on Linux
Forward emails from your server to an external address.Using /etc/aliasesEdit /etc/aliases:root: [email protected]\nwebmaster: [email protected] changes:ne...
625 views
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Configuring Postfix Relay Through External SMTP
Learn how to set up and configure postfix on your VPS with step-by-step instructions, including relay and best practices for production environments.
111 views
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Email Authentication: SPF, DKIM, and DMARC Explained
Without authentication, anyone can send email claiming to be from your domain. SPF, DKIM, and DMARC work together to prevent this.
245 views
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Setting Up Rspamd for Email Spam Filtering
Step-by-step tutorial for rspamd on Ubuntu/Debian servers, with practical code examples and troubleshooting tips.
115 views
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SPF, DKIM, and DMARC Configuration Guide
Step-by-step tutorial for spf on Ubuntu/Debian servers, with practical code examples and troubleshooting tips.
120 views
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Dovecot Sieve Filters for Server-Side Email Rules
A comprehensive guide to dovecot covering installation, configuration, and optimization for Linux VPS environments.
120 views
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Mail-in-a-Box Simple Email Server Deployment
Learn how to set up and configure mailinabox on your VPS with step-by-step instructions, including simple and best practices for production environments.
112 views
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Configuring Email Aliases and Forwarding
Learn how to set up and configure aliases on your VPS with step-by-step instructions, including forwarding and best practices for production environments.
117 views