How Do I Choose the Best Open Source SMTP Server?

Citadel is a well-known Linux open source mail server system. It provides complete mail server functions, including support for SMTP / POP / IMAP protocols and SSL login, workbook, calendar, schedule management, mailing list, online chat, and more. Useful features. At the same time, Citadel provides a friendly human-machine interface. Compared with traditional mail servers such as Postfix, Citadel's web interface is beautiful and easy to use, and it can be used as a corporate office collaborative office system. Compared with Zimbra, the software is smaller in scale, occupies less resources, and has relatively better performance.

Citadel

(Linux open source mail server system)

Right!
Citadel is a well-known Linux open source mail server system. It provides complete mail server functions, including support for SMTP / POP / IMAP protocols and SSL login, workbook, calendar, schedule management, mailing list, online chat, and more. Useful features. At the same time, Citadel provides a friendly human-machine interface. Compared with traditional mail servers such as Postfix, Citadel's web interface is beautiful and easy to use, and it can be used as a corporate office collaborative office system. Compared with Zimbra, the software is smaller in scale, occupies less resources, and has relatively better performance.
Foreign name
Citadel
Attributes
Linux open source mail server system
Nature
Provides complete mail server functionality
Method
Easy installation
[1]
  1. Run apt-get install citadel-suite spamassassin amavisd-new to install the package.
  2. Generate a self-certified SSL certificate.
    , execute cd / etc / ssl / citadel
    , execute openssl req -new -nodes -newkey rsa: 4096 -days 365 -keyout citadel.key -out citadel.csr
    , execute chmod 600 citadel.key
    , execute openssl x509 -req -days 365 -in citadel.csr -signkey citadel.key -out citadel.cer
    , execute cp -a citadel * / etc / ssl / webcit /
  3. This completes the installation of the Citadel mail server system. We can log in to the website through https to manage email domain names, accounts, and other functions. [2]

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