Is this the only way of connecting as SMTP ports are being blocked by provider (Digital Ocean) and their support doesnt respond to the ticket. (I see several requests like Proposed changes to discourse-setup because Digital Ocean blocks outbound smtp - Dev - Discourse Meta

this is not the solution for us as they didnt respond to the ticket [图片] DigitalOcean blocking SMTP and forcing SendGrid usage Support Definitely good advice, and thank you for it. However, DO’s offerings plays quite nicely with some other things I’m building and trying to connect without hassle, so it’d be wonderful if they didn’t pull such sketchy moves. Nearly any Ubuntu server could — in theory — work just fine so your point is completely valid.

Just edit the port and change to 2525 or submit a ticket if you’re using something that doesn’t support 2525

Thanks a lot. In the meantime Jesus came :innocent: and told the same -Thank you for contacting DigitalOcean Support. My name is Jesus Silva, and I’ll be assisting you with your request. I understand your concerns around the SMTP restriction placed on your account. We understand that you have an application requirement or a business need to enable port 25, 465 and 587. However due to our current policy we are unable to facilitate requests to remove the restriction on this port. We recommend utilizing alternative ports if your application allows, such as port 2525. You can also use REST API with SendGrid, which allows you to send emails via HTTP requests instead of the traditional SMTP protocol if it is suitable for you or make use of another third-party sending service. We’re always available if you need anything or have more questions. Just let us know! Regards, Jesus Silva

So, basically no SMTP with digital ocean (as 2525 is not the option or not the reliable one)

One of my projects recently suffered this and 2525 was not able to send email. I suspect they are silently also blocking this port too. The only way we could send again was to raise a ticket and get the restriction lifted (which was very easy because no history of spam as they said) once it was lifted the emails worked.

[图片] Denis_Didkovsky: We understand that you have an application requirement or a business need to enable port 25, 465 and 587. However due to our current policy we are unable to facilitate requests to remove the restriction on this port. We recommend utilizing alternative ports if your application allows, such as port 2525. Meanwhile.. Contabo… not the best provider on disk speed on a standard VPS instance… offers access to port 25. In fact I am running a MailCow instance on one of their VPS instances for several of my sites (7 to be exact).. and shock of all shocks… the IP shows clean in every checker I could use to see if it was a trashed ASN or IP. [Screen Shot 2025-04-18 at 8.20.28 AM] I use DO for multiple sites.. but for mail delivery.. I will run away from them as if they were a plague carrier. They have a horrible IP/ASN history and delivering mail from almost ANY of their ASN/IP addresses is problematic as their ASN/IP’s are listed in many lsts. I was honestly surprised at how clean the IP/ASN for my Contabo VPS was since it is a low end/cheap VPS offering.

除了SMTP（在Digital Ocean上）之外，连接电子邮件服务的其他方法

产品支持

Denis_Didkovsky (DenisD) 2025 年4 月 17 日 23:41 3

这对我们来说不是解决方案，因为他们没有回复工单

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DigitalOcean blocking SMTP and forcing SendGrid usage Product Support email	11	4147	2025 年4 月 17 日
Looks like DO is disabling Smtp in their Discourse hosting plans Self-hosting hosting	25	1117	2024 年8 月 20 日
Proposed changes to discourse-setup because Digital Ocean blocks outbound smtp Development	28	3352	2025 年6 月 9 日
Digital Ocean blocking Port 587 Product Support	1	706	2025 年3 月 31 日
Not able to send the email on digital ocean Self-hosting	7	1252	2019 年6 月 23 日

除了SMTP（在Digital Ocean上）之外，连接电子邮件服务的其他方法

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