SNS email/text not being sent, previously worked fine

Question

I have a topic with three subscriptions:  
- an email address  
- SMS  
- SQS queue  
  
This has worked for years, but I noticed recently that it's not working now.  From the console I send a test message, and it shows up fine in the SQS queue- but neither the email nor SMS subscriptions are receiving messages.  I checked the spam box for the email.  
  
I tested with another topic that the same email subscribes to, didn't work there either.  Added a new email to that topic, it receives the messages fine.  I tried deleting and re-adding the email address that's failing, and it receives the confirmation message- but no messages to the topic.  And even if there was something weird going on with that email address- still suspicious that the SMS that's worked for years now doesn't work either.  
  
Anything else to try for the email that doesn't work (since I've already deleted and re-added it)?  Why about the SMS?  
  
Thanks!

Answer

I think perhaps the subscription filter policy for removing automated integration test messages I had was the cause for not getting console test messages:  
{  
  "ip": \[  
    {  
      "anything-but": "192.168.0.80"  
    }  
  ]  
}  
  
I didn't think this would block AWS console test messages, and even after removing it the console test messages were blocked.  But some minutes later the console test messages would work again.  I could be wrong, but it appears that two strange things are a factor:  
1.  Changing the subscription filter policy has a few minutes delay  
2.  This ip filter is somehow blocking the console test messages  
  
The messages not firing from the application were a separate problem related to PrivateLink.

SNS email/text not being sent, previously worked fine

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