Issue Summary

Hello team,

When the customer is trying a custom email option for their Statuspage and when they are facing issues with DKIM validation the error noticed on the customer end is invalid.

In one example the customer got the error: "There was a problem on our side when checking this. Try hitting the 'Revalidate All Records' button above, or contacting support." 

In some cases, this seems to happen if the domain is already registered with Mailgun for another service - In other cases, this seems to be a backend error preventing the DKIM configuration/validation.

Steps to Reproduce

1. Configure a custom "Send from email"
2. Check the "DNS Configuration" tab

Expected Results

The DKIM #1 expected hostname/values should appear, or in case the domain is already registered with Mailgun, it should warn the user explicitly

Actual Results

The error generated on the admin panel at customer end states "There was a problem on our side when checking this. Try hitting the 'Revalidate All Records' button above, or contacting support."  causes confusion that the issue is at Statuspage end

Workaround

Contact Statuspage support at https://support.atlassian.com/contact/#/