C# - Sending Email - STOREDRV.Submission.Exception:OutboundSpamException
问题 I am writing a small utility to help process some MySQL tasks every night and have it email my personal email if it fails (this is a personal project, so no company smtp server or anything, emails going through public outlook accounts). I tested about 5 times and each send was successful, but now any attempts to send email I get this exception: Error sending test email: Transaction failed. The server response was: 5.2.0 STOREDRV.Submission.Exception:OutboundSpamException; Failed to process