After installing MailCow, I was able to send emails to my own server and also receive emails. However, I was not able to send emails. I would like to share my steps to resolve β as this stumped me for a couple of days.
Checking the Postfix logs, I could see the emails were timing out.
![](https://community.mailcow.email/assets/files/2023-08-25/1692977853-91289-screenshot-from-2023-08-25-22-37-06.png)
I am using CloudFanatic as my VPS (Virtual Private Server).
I logged into my mail server to check my ports were open, and they were. Including port 25.
netstat -tunlp
![](https://community.mailcow.email/assets/files/2023-08-25/1692978204-689821-screenshot-from-2023-08-25-22-42-41.png)
Then I reached out to my VPS provider to ask if they were in fact blocking port 25 at a different level. CloudFanatic replied that they had opened port 25 for my IP and after that the issue was resolved.
![](https://community.mailcow.email/assets/files/2023-08-25/1692977699-941057-screenshot-from-2023-08-25-22-31-32.png)
I hope this may help other who are setting up MailCow and get stuck.
Best,