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Looking over some error logs in SmarterMail I noticed something very odd. I am seeing the following in the log: (I masked our server address. Changed it to some.server.com for the purpose of this post)
System.Exception: Null exception (likely a 404 or something else produced by IIS)
Upon further investigation for several months this similar events like this appear in several logs. This almost looks like an attempt to inject a URL and redirect a user. I have scanned the server for infections and it's clean.
Has any one else seen similar issues like this in their logs?