4 ms·

Microsoft + Email has been a combo from Hell for many years, blocking IPv6 addresses, deliverability issues all the time, psychotic Spam detector, complete disr

• xroche 5y ago
  My first experience with MS Exchange long time ago was that the team responsible for the infrastructure (company with more than 100k employees) committed to reboot the server once a week, because otherwise it would blow up. So yes, this is a long story.
  • marcosdumay 5y ago
    Oh, my first contact with Exchange was discovering that the recently updated server couldn't read any of the backups on the proprietary format of the pre-update version of it. It seemed to be a common enough occurrence, because the email people just shrugged and started hacking the backup. I don't think that group was ever capable of restoring any Exchange backup, normally because of Exchange's problems. But that was a long time ago. From what I hear, things are different now.
  • jcpham2 5y ago
    Sounds like unchecked IIS SMTP transport logs but hey it's been years since I maintained an on-premises Exchange server
• kureikain 5y ago
  And icloud too. They are very sensitive to ipv6. In case of icloud, I attribute it to the Proofpoint spam filtering system, which also sell service to ups.com. And even gmail, but at least gmail accept the email, then just flagged it as spam.