How to change port 25 for mail server?

aaP_zenarf86

Hi All, i'm using Google Cloud Platform and they blocked port 25 permanently. can i change port 25 on mail server with another one? thanks for the concern.

rafaelfmachado

I need too, I'm using a Digital Ocean

aaP_zenarf86

aaPanel_Captain so, it its impossible right sir?

rafaelfmachado i guest only google and aws are blocking it, but also Digital Ocean...Too bad I want to use it though

aaPanel_Captain

Post office sending and receiving are carried out through the protocol 25 port, if you use other ports, you must ensure that the 25 port can communicate normally.

aapanel_power

aaP_zenarf86 The larger cloud server vendors will prohibit the opening of port 25, because this port often sends spam, phishing and fraudulent emails, resulting in losses to other users, and this point the world's Internet cloud server companies stand together.

rafaelfmachado

I believe that software equal to aapanel had to be in line with the best practices in the market, port 25 is outdated, because of spam, let's put this Mail Server to work at the current standards, 465 or 587

slimx

The mailserver does work at 465 and 587. But the way postfix and dovcot function require port 25 to be open.
Port 465 & 587 are only used for SSL validation, while the initial 25 is used to send the actual email.

AAPANEL does have a Google Cloud plugin, I always imagined that that app would have some sort 'work around'? i guess not? (I haven't tried it, i don't use the major clouds)

rafaelfmachado

no solution yet personal ??

port 25 has been banned in almost everyone because of spam, all major providers do not accept this port, there is no adjustment that can be done, to work on ports 587 465

aapanel_power

rafaelfmachado Hello, port 25 is the protocol of 7 post offices, unless we are strong enough to shake the international postal organization to give me the freedom to use other ports, or to ask the server operator to open port 25. Otherwise we will have to accept this reality.

idpdev

aapanel_power

So, Mail Server is useless now? My problem is same like this.

aaPanel_Kern

idpdev
Hello, this is the reality now.

idflorin

idpdev works fine for me on port 25

aaP_crispincouto

I'm using 587 port with roundcube. Works fine.

idpdev

aaP_crispincouto
How could you do that?

aaPanel_Kern
So any clients who use this aaPanel can't send their own emails? Or there is an alternative to try out?

aaP_ibobgro

aaP_crispincouto Can you please let me know how and where did you swtched from port 25 to 587 in roundcube? I just do not find how to configure this. One of my websites was hacked and sent spam, causing my hosting provider to block port 25. I do not know if they will unblock the port ever.

aaPanel_Kern

idpdev
Hello, there is currently no alternative solution. Currently, the popular ones use smtp port 25 to receive and send emails. Those who use ports 465 and 587 are generally used by users in the domain to send emails.

aaPanel_Kern

Hello, the sending and receiving of the mail server can only use port 25, and the use of other ports requires the use of smtp relay

aaP_ibobgro

cannabisdoctor

How to use SMTP relay?

aaPanel_Kern

Hello, you can use smtp relay in your mail server

aaP_setiyaaji55

in manual way, postfix can change and default port, why aaPanel hide this from config? (for money of course)

aaPanel_Kern

Hello, I suggest you check the relevant information yourself. Mail servers around the world use port 25 to send and receive mail.
If you modify port 25, the other server will definitely not be able to connect to your server.
If it is a client, you can use these ports 25 465 587
At the same time, aapanel provides you with the ability to modify the configuration file yourself.

aaP_setiyaaji55