Today between 11:50 UTC and 15:33 UTC some emails (with signatures from CodeTwo) sent from tenants from Canada East might have landed in spam/junk folders due to DNS misconfiguration on CodeTwo’s end. The problem was picked by up our 24/7 Proactive Monitoring team during a standard configuration cross check today at 15:29 UTC.
The following TXT record was missing from the configuration after switching the service to a new resource: Name: ca100-emailsignatures-cloud.codetwo.com Value: v=spf1 redirect=spf.emailsignatures365.com
The most important records (spf.emailsignatures365.com and spf-ca.emailsignatures365.com) had the correct values.
The DevOps Team fixed the problem by adding the missing record at 15:33 UTC, which fixed the problem.
We are currently investigating why this issue wasn’t picked up during initial cross check and why our automated alerting system did not report the problem right away.
The majority of final recipients most likely received your emails without any problems, but some, with strict SPF requirements, might still have your emails in their junk folders. We recommend that you inform your end users about the problem.
We are profoundly sorry about this issue. We will now be reviewing all release and configuration procedures to make sure this problem never happens again.