Miscellaneous first checks

• I checked that all ports are open and not blocked by my ISP / hosting provider.
• I know that SSL errors are likely the result of a wrong setup on the user side and not caused by DMS itself. I'm confident my setup is correct.

Affected Component(s)

not buildable

What happened and when does this occur?

Error response from daemon: Dockerfile parse error line 43: Unknown flag: link

What did you expect to happen?

I expected to be able to build this image on Ubuntu 18.04 LTS with docker:

Client: Docker Engine - Community
 Version:           20.10.18
 API version:       1.40
 Go version:        go1.18.6
 Git commit:        b40c2f6
 Built:             Thu Sep  8 23:11:34 2022
 OS/Arch:           linux/amd64
 Context:           default
 Experimental:      true

Server: Docker Engine - Community
 Engine:
  Version:          19.03.14
  API version:      1.40 (minimum version 1.12)
  Go version:       go1.13.15
  Git commit:       5eb3275d40
  Built:            Tue Dec  1 19:18:45 2020
  OS/Arch:          linux/amd64
  Experimental:     false
 containerd:
  Version:          1.6.8
  GitCommit:        9cd3357b7fd7218e4aec3eae239db1f68a5a6ec6
 runc:
  Version:          1.1.4
  GitCommit:        v1.1.4-0-g5fd4c4d
 docker-init:
  Version:          0.18.0
  GitCommit:        fec3683

How do we replicate the issue?

1. Use Ubuntu 18.04
2. Use Docker
3. try to build image
4. Get the following error:

Error response from daemon: Dockerfile parse error line 43: Unknown flag: link

DMS version

dockerfile from master

What operating system is DMS running on?

Linux

What instruction set architecture is DMS running on?

x86_64 / AMD64

What container orchestration tool are you using?

Docker

docker-compose.yml

--

Relevant log output

Error response from daemon: Dockerfile parse error line 43: Unknown flag: link

Other relevant information

No response

What level of experience do you have with Docker and mail servers?

• I am inexperienced with docker
• I am inexperienced with mail servers
• I am uncomfortable with the CLI

Code of conduct

• I have read this project's Code of Conduct and I agree
• I have read the README and the documentation and I searched the issue tracker but could not find a solution

Improvements to this form?

No response