Having issues with emailing out of your VPS because Port 25 is shut? Yes, it's a definite issue. Most VPS hosts shut down Port 25 in an effort to fight spam, but that prevents your legitimate emails from being sent out—which is just senseless if you have an email server hosted for use such as newsletters, web page contact forms, and app notifications.
Luckily, not all of them close Port 25. Some of them still believe in their users and do not block outgoing mail traffic without support request or special request. If you have been looking for VPS providers like them, here is the list of the best VPS with port 25 open—based on real use and community feedback.
VPS Providers Who DO NOT Block Port 25
1. Hetzner
Most popular German host. Port 25 is wide open by default, and mail is running right away. I've hosted mail servers there myself with no problems. Spam responsibly, and you're done.
2. OVHcloud
OVH puts you entirely in your own hands, and they have outgoing SMTP traffic configured out of the box. They're one of the big hosts that still does this. Good for whoever needs reliability and scale.
3. Contabo
If you're on a tight budget, Contabo is the way to go. They've got massive resources for pennies, and sure—Port 25 is a possibility. It's perfect for small projects or startups.
4. BuyVM
BuyVM is a small but really nice business. They host mail servers only and don't block Port 25. They have fantastic and genuine customer support, which is a relief.
5. HostHatch
I don't see any SMTP restriction in hosting with HostHatch. I used them for transactional emails, and that was going fine. HostHatch is perfect in case you are looking for fast servers and no email problem.
6. Netcup
This is an another mail-server friendly German host. It doesn't restrict the outgoing ports and is very reasonably priced. You will find it good for hobby use or home use.
So, if you're tired of VPS hosting ruining your email configurations then now you don't have to worry anymore. Just grab one from the above list which gives you complete control. All the above hosts support Port 25, so your emails will work just fine. But beware, just don't spam your server—nobody likes that!