[Others]Change port 25 to send email using ECS instance

Hi everyone,


I have an ECS instance (ubuntu 16.04) which I used to setup a plesk to build a wordpress website. I have also create an email using the same instance on plesk.


I am having diffcult sending emails but have no problem recieving them. From what the techincal support team told me, alibaba cloud had blocked port 25 and i was adviced use the port 465 instead. Can anyone teach or provide me with a guide on how to change my port to 465, please?!


As i am using webmail (horde) and the replies i got from the support team to change the stmp port is for outlook and thunderbird etc.


Thanks,
Party

Hello there Party,


I was looking in this guide https://dzone.com/articles/how-to-setup-email-server-with-postfix-dovecot-dir and he mentions that you have to user Alibaba Cloud Direct Mail to do that  https://www.alibabacloud.com/product/directmail?spm=a2c5t.10695662.1996646101.searchclickresult.3270207fFUFegV


hope it can be of any help.

this is the solution:
https://wiki.contribs.org/PortRedirect

This is what i looking for...

thanks all

please find   mentioned below command i hope it will help you.



iptables -A PREROUTING -t nat -p tcp --dport 9993 -j REDIRECT --to-port 993
iptables -A PREROUTING -t nat -p tcp --dport 4465 -j REDIRECT --to-port 465