![]() ![]() Easy to configure (configuration according to parameters (rules) that are to be defined in the config file).PLAIN / LOGIN / CRAM-MD5 / DIGEST-MD5 / ANONYMOUS / EXTERNAL / G2 / GSSAPI / GSS-SPNEGO / KERBEROS_V4 / NTLM / OTP / PASSDSS / SCRAM / SRP / SPA / Dovecot SASL / GNU SAS / Heimdal GSSAPI PLAIN / LOGIN / CRAM-MD5 / DIGEST-MD5 / ANONYMOUS / EXTERNAL / G2 / GSSAPI / GSS-SPNEGO / KERBEROS_V4 / NTLM / OTP / PASSDSS / SCRAM / SRP / X.509 PKI auth via STARTTLS and EXTERNAL PLAIN / LOGIN / CRAM-MD5 / DIGEST-MD5 / ANONYMOUS / EXTERNAL / G2 / GSSAPI / GSS-SPNEGO / KERBEROS_V4 / NTLM / OTP / PASSDSS / SCRAM / SRP Postfix is a security-oriented MTA, whereas Sendmail is standard MTA for Unix systems, and Exim is customizable and one of the most flexible mail transfer agents in terms of configuration. Whether source code contributions are regular.Which embedded scripting language is used.Whether the syntax is minimal and careful.Based on these criteria, you can dive deeper into some technical aspects, such as: The list might be even longer depending on the goals you’re pursuing. To choose the best option for your needs, you should consider a few selection criteria: security, performance, documentation, and viability. Postfix, Sendmail, and Exim fall into this category. As a rule, this type of mail transfer agent receives emails from relay-only MTAs and then relays them forward. Does the MTA support the requirements for connecting to the ISP SMTP server? These requirements may include a specific authentication or TLS.įull-fledged MTAs, also known as mail hubs, can handle all the details of the Internet mail delivery.Can the MTA replace the system mail delivery agent (MDA)? If it can, then it will handle all the mail coming from the system.Can the MTA queue emails for later delivery in case of a failure?.However, you should consider the factors: This type of mail transfer agent is a good choice if you just want to send emails to your email address, such as Gmail. The most used relay-only MTAs are nullmailer, msmtp, and sSMTP. Relay-only or send-only MTAs can forward your emails to another server, which is typically the SMTP server of your Internet service provider (ISP). The first thing to consider is the type of MTA: relay-only or full-fledged. That’s why you have to analyze each detail to make the appropriate choice. Running your own mail server is troublesome. The emphasis will be on the three well-known solutions: Postfix, Sendmail, and Exim. In this article, we’re going to focus on the hands-on aspect of choosing an MTA for your project. There was also a quick look at the most commonly used MTAs and specifications. In the blog post, “What is MTA?”, we explored the basics of mail transfer agents and how they affect the deliverability of emails. ![]()
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