My last 2 posts to Twitter were rejected with this Zoho error:

Your profile is temporarily blocked from publishing content by Twitter. Please try posting later.

When I logged into Twitter I was able to create the same post directly. However, when I tried using the Zoho shortened URL Twitter rejected it with this error:

This request looks like it might be automated. To protect our users from spam and other malicious activity, we can’t complete this action right now. Please try again later.

So I used a bit.ly link that resolved to the same Youtube URL and it worked fine. I also create a 2nd Tweet using the Youtube link directly within Twitter. 

I then tried reposting the same content in Zoho using the shortened Zoho URL and it was blocked again. I then used the Youtube link unshortened and it posted fine.

Therefore I think Twitter are rejecting the Zoho created shortened URL's - at least for my login. Not sure about everyone else?

This has only just started happening recently. I wasn't having problems previously.

Thanks.