Hello Workspace Admin,
I want to join the slack community, could you please help.
challenge:
I don’t email ID with domain as mentioned on site.
- zup.com.br
- kodekloud.com
I’ve tried with my personal ID as well but not succeeded.
Regards,
Madhav S.
Short version: you can’t. We no longer use Slack for community outreach 
We use Discord instead, and you’re very welcome to join that. Here’s the page with the link you need.