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by Crosseye_Jack 2741 days ago
Replying again because I can not edit my orig post.

It seem that they have been banning based off IP address. They allow appeals via email.

Copy of a Tweet from Slack. > Hi. Our systems may have detected an account on our platform with an IP address originating from a designated embargoed country. Please send a note to feedback@slack.com so we can investigate further.