mrssurv

Thank you tzrtim..

What Randy says there is correct, specifically the end part of things in relation to shared IP addresses

Most people are not using VPNs.  Those that are, most likely are not using a specific VPN endpoint that had been doing bad things recently.  Typically those restrictions last a period of time (as in many cases those repetitional blocks keep you blocked for a period of time).  
And while you may be able to browse other sites...  those same sites are most likely not using the same firewall or the same reputation services that IPS might utilize.  
This is not about trying to target you personally or even your VPN provider.  Instead if you use a service that makes use of a shared IP, you run the risk of being lumped into sharing a "virtual reputation" from anyone else that might be doing bad things with your same IP.  

The firewall may block you temporarily at a time if you exceed the number of actions permitted or encounter many different errors in the allotted time.
As the VPN you're using is coming from a datacenter/shared IP address, it could also be used by other individuals (or bots) accessing our network which may also improve your chances of hitting the above.
Waiting or changing IP address will help get around the temporary firewall block.

I got this for the first time also on the 24th, but I sent out a bulk email for the first time in a year on that day. I typically use a newsletter app. I got five of these, triggered from the bulk email. I've never received these from regular email notifications that go out. 

It depends on what your setting for retaining deleted posts is set to. In the ModeratorCP, look at the Deleted Content section. See if the post is there to restore. 

I had something similar happen so now I don’t have the deleted content purged until 90 days just to be safe and have plenty of time to catch problems. 

ModCP > Deleted Content is where you would look, as mentioned above. If it's not there, then the only way you would be able to restore it would be to restore your database entirely to an earlier point in time. 
You can set up whether items are 'soft' deleted from System>Settings>Posting, within your admin CP.

We also had no way of submitting a ticket when the outage occurred. There should be an alternative way to create a ticket in cases like this because, at the time, I had no way of knowing if the issue was just related to our site, or to the community itself.
I did find the status.invisioncommunity.com to be helpful but I think we should still have been able to submit a ticket.
Thanks to the support team to getting things back online.

Hello.
Our apologies for the inconvenience, we’re aware of an issue on our cloud and are working to correct that right now.
We’ll have the issue fixed as as soon as we are able, and appreciate your patience while this is being handled.
You can monitor the issue on our status page here: https://status.invisioncommunity.com/

Yes, it should be online now. If you see any further issues, please let us know.

It's working now.