Sending of mails does not work - deliver queue shows always all mails

[André Schmidt]

Hi.

Using the free version. Complete fresh installation on a new ubuntu server as docker service.

Try to sending an email works for the client. But the mail is never delivered and laying always in the deliver queue. :(

‌

[André Schmidt]

Looks very strange.

‌

[André Schmidt]

Now all works fine without outbound Port 25

[André Schmidt]

I figured the out the problem. Port 25 and 465 are blocked by my server isp. Can I change the outgoing Port?

[SH]

The only one who can solve your issue is ISP. Outbound port can't be changed, it is something every mail server depends on. Other option is to direct your outbound emails to third party service (smarthost).