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Unable to send mail to different domain RRS feed

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    we currently are under domain like abc.com unable to send mail to different domains. it starts from google gmail.com all settings seems to be good from our end. all mxrecords are in place. suggest me the network point of view or wireshark analysis to be done. like retriving smtp_server_@abc_com.pcapng file.
    Saturday, August 24, 2019 4:13 AM

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    Hi

    Firstly check if you are on a blacklist, you can use mxtoolbox.com for that.

    Was it working and stopped working? Other records like SPF and DMARC in place?

    Can you telnet out on port 25?

    Any modifications to the send connector?

    Hope this helps. Please remember to click “Mark as Answer” on the post that helps you, and to click “Unmark as Answer” if a marked post does not actually answer your question. This can be beneficial to other community members reading the thread.

    Saturday, August 24, 2019 7:23 PM
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    Hi siddesh,

    Except above suggestions, when sending a mail failed, did you get any NDR message ? If so, please post the NDR message here, that would give us more clues to help troubleshoot the issue.

    Best Regards,
    Niko Cheng

    Please remember to mark the replies as answers if they helped. If you have feedback for TechNet Subscriber Support, contact tnsf@microsoft.com

    Monday, August 26, 2019 8:27 AM
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    Hi Siddesh,

    I'm just writing to check how's everything going? If you have any questions or needed further help on this issue, please feel free to post back. If the issue has been resolved, please mark the helpful replies as answers, this will make answer searching in the forum easier and be beneficial to other community members as well.

    Thanks for your understanding.

    Best Regards,
    Niko Cheng

    Please remember to mark the replies as answers if they helped. If you have feedback for TechNet Subscriber Support, contact tnsf@microsoft.com

    Wednesday, August 28, 2019 9:08 AM
    Moderator