How to change smtp port number 25 in postfix
How to change smtp port number 25 in postfix Bydefault the SMTP protocol runs at port no. 25. You can change the port no. to any port no. other than below 2048. 0 to 2048 are IANA authorized known port no.but we have some other port no. also which are bydefault used by manyapplication for….