![]() (port 587, 3rd line in example below) like below: # smtp/submission Latest iRedMail releases use nftables on Debian/Ubuntu, you can find itsĬonfig file /etc/nf, add port 465 under the line for submission Restart firewalld service: # firewall-cmd -complete-reload ![]() Update file /etc/firewalld/zones/iredmail.xml, enable smtps service by on RHEL/CentOS 7, please add file /etc/firewalld/services/smtps.xml, with content below.on RHEL/CentOS 6, please update iptables rule file /etc/sysconfig/iptables, add one rule (third line in below code) for port 465, then restart iptables service.WARNING: Please make sure you have Amavisd listening on port 10026 (and 10024, 9998). o smtpd_client_restrictions=permit_sasl_authenticated,reject Please append below lines in Postfix config file /etc/postfix/master.cf (Linux/OpenBSD) or /usr/local/etc/postfix/master.cf (FreeBSD): 465 inet n - n - smtpd To enable SMTPS, you should configure Postfix to listen on port 465 first, then open port 465 in iptables. The only way for service providers to offer those clients an encrypted connection is to maintain port 465. Service providers that maintain port 465 do so because older Microsoft applications (including Entourage v10.0) do not support STARTTLS, and thus not the smtp-submission standard (ESMTPS on port 587). Quote from :Įven in 2013, there are still services that continue to offer the deprecated SMTPS interface on port 465 in addition to (or instead of!) the RFC-compliant message submission interface on the port 587 defined by RFC 6409. Unfortunately, there're some popular mail clients don't support submission (SMTP over STARTTLS, port 587), the famous one is Microsoft Outlook. The port 465 is now registered for Source-Specific Multicast audio and video. SMTP was seen as particularly important, because clients of this protocol are often other mail servers, which can not know whether a server they wish to communicate with will have a separate port for TLS. With STARTTLS, the same port can be used with or without TLS. By the end of 1998, this was revoked when STARTTLS has been specified. Originally, in early 1997, the Internet Assigned Numbers Authority registered 465 for SMTPS. SMTPS is deprecated, so iRedMail disable it by default. Why iRedMail doesn't enable SMTPS (SMTP over SSL) by default Since iRedMail-1.5.0, smtps is enabled by default.
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