That red exclamation mark that pops up next to your Skype messages, indicates youre experiencing atemporary connection drop.
As a result, Skype failed to send your messages.
For the next 24 hours, Skype will be attempting to deliver the messages it failed to send.
But heres how you’re able to speed up the process.
So, go ahead and reboot your router and computer.
Wait two minutes and then power up your gadget.
In case youre using a wireless connection, try switching to a cable connection.
Or switch to a different Wi-Fi channel.
In other words, theyre been disconnected from the Internet for quite some time.
If its been less than 24 hours since you sent the messages, Skype will attempt to deliver them.
Otherwise, youll need to send those messages again.
Add the Problematic Contact Again
Maybe your contact accidentally removed you from their Contacts list.
Ask them to add you back and find out if the red exclamation mark is gone now.
Feel free to do the same on your end.
Remove the problematic contact and add them again.
Ensure your contact has added you under their Contacts list.
Keep in mind that both ends need to accept the contact request for be able to send messages.
If youre running an older Skype version, use the Reset option.
Simply tap on the update notification to revamp your Skype version.
If that did not work, uninstall and reinstall the app.
Most likely, this is due to temporary Internet connection issues.
Restarting your box and router should help you troubleshoot the problem.