Optional and Restrictive SMTP Auth, The Difference is important!
2019-09-20 - hschneider, Admin
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Optional and Restrictive SMTP Auth, The Difference is important!| hschneider |
Posted: Nov 28 2002, 07:44 PM
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 No - I'm not an answering script ...  Group: Admin Posts: 6631 Member No.: 195 Joined: 19-June 02  |
When it comes to SMTP AUTH, we have to differ 2 different settings:
RESTRICTIVE SMTP AUTH: - Enable "SmtpConfig" "mail-auth" in your server.tab - Enable SMTP Authentication on your client - This makes your system private to your domain users only other SMTP's cannot send mail to your server, because they cannot authenticate. - If you send mail to other SMTP servers, they might blacklist you as a private spam server. - Enabling RESTRICTIVE SMTP AUTH is generally a bad idea. OPTIONAL SMTP AUTH: - Disable "SmtpConfig" "mail-auth" in your server.tab - Clear smtprelay.tab or limit it to your LAN, only. - Enable SMTP Authentication on your client - Even when you have disabled "mail-auth" in your server.tab, XMail accepts client requests for SMTP Auth. - This won't get your server marked as a spam server ... - ... and other SMTP's can deliver mail to your system without authentication. So if you disable POP_BEFORE_SMTP (with "EnableAuthSMTP-POP3" "0" in your server.tab) and use OPTIONAL SMTP AUTH, you deny relaying and force your own users to authenticate. Thanks to Andrew Joakimsen for that hint! -------------------- Bye,
Harald -- Download XMail Queue Manager 1.46 NOW: XMail Server Tools -- Cross platform remote queue management! -- Message analyzing on the fly! -- Builtin diagnostics knowledge base! -- Manages multiple mail queues! Sponsored by CD-Produktion und DVD-Produktion and Homestaging Saarland - Immobilien schneller verkaufen in der Region Saarland, Rheinland-Pfalz und Luxembourg |
  
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