I can't type some domain name strings in comments or messages on Facebook? It gives the following error:
You can't post this because it has a blocked link
The content you're trying to share includes a link that our security systems detected to be unsafe:
gmailo.com
6l9.com
Please remove this link to continue.
If you think you're seeing this by mistake, please let us know.
7.0.12.0 is another string that doesn't work.
Best Answer
The error message explains it clearly. It looks like you're trying to post links to sites that Facebook deems "unsafe", likely because it is overtly or secretly set up to use exploits to compromise the system of whoever visits. (Google does much the same thing in their search results and with the Chrome browser.)
Facebook tries to be helpful by converting text that looks like a web domain into a link, because most people aren't savvy enough to do it themselves. But those particular strings happen to be for bad actors. Unless you're trying to tell people not to go to those sites, I can't think of a single reason you need to be able to post them.