<![CDATA[Open port 25 on DigitalOcean server]]>I went through the documentation of (https://docs.cloudron.io/email/#required-ports).
I check when I try to send the mail, the mail is not received, I believe it is blocked port 25.
I don't want to forward the mail anywhere, I can open that port 25 directly on my vps or somehow can send and receive mail.
Thanks

]]>https://forum.cloudron.io/topic/5629/open-port-25-on-digitalocean-serverRSS for NodeTue, 09 Jun 2026 14:25:23 GMTTue, 07 Sep 2021 16:16:21 GMT60<![CDATA[Reply to Open port 25 on DigitalOcean server on Wed, 08 Sep 2021 08:59:57 GMT]]>@sangroot this unfortunately means that your server got an IP with a bad reputation ending up in the blocklist. To explain, those IPs are constantly reused and it could just be that either this IP itself was used by a spammer in the past or that some other IPs in that IP block might have been spammer IPs.

This is not unusual though and it takes a bit to get IP reputation up and manually removing it from blacklists by appealing is the first step in this case.

If you need to deliver emails reliably from the start, you may consider using a mail relay configured through Cloudron for some time until you are off of all those blocklists.

]]>https://forum.cloudron.io/post/36207https://forum.cloudron.io/post/36207Wed, 08 Sep 2021 08:59:57 GMT<![CDATA[Reply to Open port 25 on DigitalOcean server on Wed, 08 Sep 2021 08:03:27 GMT]]>@sangroot sorry but can you at least google yourself or just click the URL with the error / warning?

But yes of course there is a way that's why this check is there in the first place.

https://check.spamhaus.org/listed/?searchterm=139.59.224.167

]]>https://forum.cloudron.io/post/36202https://forum.cloudron.io/post/36202Wed, 08 Sep 2021 08:03:27 GMT<![CDATA[Reply to Open port 25 on DigitalOcean server on Wed, 08 Sep 2021 04:28:34 GMT]]>@brutalbirdie said in Open port 25 on DigitalOcean server:

and what about this other red information This server's IP 139.59.224.167 is on a blocklist.?
By SpamHaus Zen.

This is the server I just created from DO, is there any way to appeal, or do I have to create another server and start over with Cloudron

]]>https://forum.cloudron.io/post/36196https://forum.cloudron.io/post/36196Wed, 08 Sep 2021 04:28:34 GMT<![CDATA[Reply to Open port 25 on DigitalOcean server on Tue, 07 Sep 2021 21:04:05 GMT]]>@sangroot and what about this other red information This server's IP 139.59.224.167 is on a blocklist.?
By SpamHaus Zen.

]]>https://forum.cloudron.io/post/36187https://forum.cloudron.io/post/36187Tue, 07 Sep 2021 21:04:05 GMT<![CDATA[Reply to Open port 25 on DigitalOcean server on Tue, 07 Sep 2021 18:19:35 GMT]]>I have not been able to send mail even though I have opened all the ports.
2021-09-08_1-13-21.png 2021-09-08_1-13-45.png

]]>https://forum.cloudron.io/post/36179https://forum.cloudron.io/post/36179Tue, 07 Sep 2021 18:19:35 GMT<![CDATA[Reply to Open port 25 on DigitalOcean server on Tue, 07 Sep 2021 18:11:34 GMT]]>I asked DO to open port 25 complete, but PTR port is having problem.
2021-09-08_1-09-44.png 2021-09-08_1-09-59.png

]]>https://forum.cloudron.io/post/36178https://forum.cloudron.io/post/36178Tue, 07 Sep 2021 18:11:34 GMT<![CDATA[Reply to Open port 25 on DigitalOcean server on Tue, 07 Sep 2021 17:38:58 GMT]]>Incoming port 25 should already be open. However most VPS provider will block outbound port 25 to reduce spam.
Do you have an extra firewall in front of your server or what exactly is the issue you are facing?

]]>https://forum.cloudron.io/post/36174https://forum.cloudron.io/post/36174Tue, 07 Sep 2021 17:38:58 GMT