Office 365 User 550 5.7.501 Access denied, spam abuse detected RRS feed

  • Question

  • Hi

    We have configured a Bot (Microsoft Bot Framework) with e-mail channel (email address at office 356).
    Bot does receive incoming email messages from mailbox, responds them and builds outgoing email message.

    But then the message is not delivered with the error

    Remote Server returned '550 5.7.501 Access denied, spam abuse detected. For more information please go to'

    However, direct sending email from Bot's mailbox (via Office365 portal) to same recipient does work just fine.
    Moreover, the same failed messages are successfully sent and delivered if MANUALLY resent from O365 OWA.
    Tried this with 3 different email servers including
    Same thing.

    Bot framework guys suggest here
    that it's related to a way the message is send (EWS API' or via OWA)

    Any ideas or suggestions?



    Tuesday, February 7, 2017 9:40 PM

All replies

  • Hi,

    Can you provide the code that you are using to send the email?

    Regards, Sjoukje

    Please remember to click 'Mark as Answer' on the post that helps you.

    Thursday, February 16, 2017 10:02 AM