Instructions on how to open the 25th port

Port 25 is a standard network port that is used for the SMTP (Simple Mail Transfer Protocol) mail protocol. Used to send email from the client to the mail server. When you send an email, your email is sent via port 25 to the mail server, which then delivers it to the recipient.

Why is it being closed?

Spam on port 25 refers to unsolicited electronic messages that are sent through this network port. Cybercriminals can use it to send mass spam emails without the consent of the recipients. This can lead to an overload of mail servers and negatively affect the work of e-mail. To combat spam, many Internet service providers block access to port 25 for everyone except their own mail servers.

What should I do if I need to open port 25?

If you want to open port 25 on your server, you need to write a ticket to technical support by answering the questions:

1. For what purpose do you need port 25?

2. How many emails are you going to send on average per month?

3. Has your contact database agreed to receive this newsletter?

After that, the technical support staff will make a decision on opening port 25 on your server.

IMPORTANT: if after opening the port you still have a complaint about spam, technical support specialists reserve the right to block the account of the user who violated the rules.