Hello everyone,

I’m using Odoo 18 (Community Edition) and trying to configure the outgoing mail server.

Here are my details:

- SMTP Server: mx4125.usc1.mymailhosting.com

- Port: 587

- Encryption: TLS (STARTTLS)

When I click “Test Connection,” I get this error:

Invalid Operation: No response received. Check server address and port number. Timed out.

I tried both port 587 (TLS) and 465 (SSL/TLS), but the same timeout happens. 

I verified SPF, DKIM, and DMARC, and they are correctly set.

Is there any network or Odoo configuration I might be missing? 

How can I confirm whether Odoo can reach the SMTP server?

Thanks in advance!