On Friday March 3rd, beginning at 16:28 EST we discovered an unusually high level of spam emails being sent with the Chargify platform.
We first temporarily disabled email sending and were able to then target and stop the offending emails. (This is the action that caused the delay in background processing on Friday from 16:30 EST to 18:20 EST).
In order to ensure maximum deliverability, we also switched to delivering all new emails from our published backup IP address (220.127.116.11 instead of 18.104.22.168). This way legitimate emails from Chargify merchants would not be marked as spam.
Even so, every recipient server has different rules on what emails it considers spam and some may still be weary. Hotmail, AOL, and Yahoo are the most aggressive at flagging messages and we've had a few reports of legitimate messages from Friday not making it through.
However at this time we believe the impact is minimal and we're seeing very good deliverability rates on all the metrics available to us, especially on new emails being sent out today. We'll continue to monitor the situation very closely to keep ensuring that our sending reputation remains good and as many emails as possible get delivered.
If you're seeing some of your emails marked as spam, we recommend the following steps:
If you have any questions please feel free to reach out to email@example.com. We'll be happy to help investigate!