topic MTA - SMTP multiple ports in Firewall and Security Management https://community.checkpoint.com/t5/Firewall-and-Security-Management/MTA-SMTP-multiple-ports/m-p/110687#M15220 <P>Hello Checkmates,</P><P>sk142932 shows "<SPAN>How to configure Mail Transfer Agent's (MTA) incoming and outgoing SMTP ports</SPAN>" it is very useful as many servers work with SMTP/TLS port 465. My question is if it is supported to have both ports 25 and 465 enabled for SMTP incoming traffic. If it is supported, port 25 should alse be defined at&nbsp;<STRONG><EM>postfix_outgoing_smtp_port file?&nbsp;</EM></STRONG>or is it implied? Thanks in advence.</P> Fri, 12 Feb 2021 21:12:19 GMT RS_Daniel 2021-02-12T21:12:19Z MTA - SMTP multiple ports https://community.checkpoint.com/t5/Firewall-and-Security-Management/MTA-SMTP-multiple-ports/m-p/110687#M15220 <P>Hello Checkmates,</P><P>sk142932 shows "<SPAN>How to configure Mail Transfer Agent's (MTA) incoming and outgoing SMTP ports</SPAN>" it is very useful as many servers work with SMTP/TLS port 465. My question is if it is supported to have both ports 25 and 465 enabled for SMTP incoming traffic. If it is supported, port 25 should alse be defined at&nbsp;<STRONG><EM>postfix_outgoing_smtp_port file?&nbsp;</EM></STRONG>or is it implied? Thanks in advence.</P> Fri, 12 Feb 2021 21:12:19 GMT https://community.checkpoint.com/t5/Firewall-and-Security-Management/MTA-SMTP-multiple-ports/m-p/110687#M15220 RS_Daniel 2021-02-12T21:12:19Z Re: MTA - SMTP multiple ports https://community.checkpoint.com/t5/Firewall-and-Security-Management/MTA-SMTP-multiple-ports/m-p/110706#M15226 <P>That looks like it speaks to the port used for outgoing connections not incoming connections.</P> Sat, 13 Feb 2021 03:20:29 GMT https://community.checkpoint.com/t5/Firewall-and-Security-Management/MTA-SMTP-multiple-ports/m-p/110706#M15226 PhoneBoy 2021-02-13T03:20:29Z Re: MTA - SMTP multiple ports https://community.checkpoint.com/t5/Firewall-and-Security-Management/MTA-SMTP-multiple-ports/m-p/110980#M15281 <P>So, after consulting TAC,&nbsp;officially it is not supported to use two ports&nbsp;simultaneously for SMTP traffic in MTA.</P> Wed, 17 Feb 2021 02:42:59 GMT https://community.checkpoint.com/t5/Firewall-and-Security-Management/MTA-SMTP-multiple-ports/m-p/110980#M15281 RS_Daniel 2021-02-17T02:42:59Z