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Client host [103.248.XXX.XXX] blocked using FBLW15

    Question

  • I have already request to be de-listed but no response. please help

    Delivery has failed to these recipients or distribution lists:

    Client host [103. 248. XXX. XXX] blocked using FBLW15


    Tuesday, October 20, 2015 9:10 AM

Answers

  • Hi Manoj,

    Thank you for your question.

    If you send email to the specific domain and get this error, we suggest you contact the administrator of the specific domain to remove 103.248.x.x from black list.

    If external client send email to your domain with this error, you could remove 103.248.x.x from your black list.

    Best Regard,

    Jim

    Please remember to mark the replies as answers if they help, and unmark the answers if they provide no help. If you have feedback for TechNet Support, contact tnmff@microsoft.com.

    Jim Xu
    TechNet Community Support

    Wednesday, October 21, 2015 8:48 AM
    Moderator

All replies

  • Exchange Online, right?  I recommend that you post this in the Office 365 Exchange Online Forum:  http://community.office365.com/en-us/forums/158.aspx

    I suspect they'll tell you the same thing I would, which is that nobody here can fix that for you.


    Ed Crowley MVP "There are seldom good technological solutions to behavioral problems."
    Celebrating 20 years of providing Exchange peer support!

    Tuesday, October 20, 2015 3:29 PM
    Moderator
  • Hi Manoj,

    Thank you for your question.

    If you send email to the specific domain and get this error, we suggest you contact the administrator of the specific domain to remove 103.248.x.x from black list.

    If external client send email to your domain with this error, you could remove 103.248.x.x from your black list.

    Best Regard,

    Jim

    Please remember to mark the replies as answers if they help, and unmark the answers if they provide no help. If you have feedback for TechNet Support, contact tnmff@microsoft.com.

    Jim Xu
    TechNet Community Support

    Wednesday, October 21, 2015 8:48 AM
    Moderator
  • hi Jim!

            i have same problem with my domain.

    " Jan 28 10:50:21 istt postfix/smtp[51745]: 3564D106645A: to=<xxx@radcom.com>, relay=xxx-com.mail.protection.outlook.com[213.199.154.87]:25, delay=8.6, delays=0.05/0.01/3.2/5.3, dsn=5.7.1, status=bounced (host xxx-com.mail.protection.outlook.com[213.199.154.87] said: 550 5.7.1 Service unavailable; Client host [101.99.20.114] blocked using FBLW15; To request removal from this list please forward this message to delist@messaging.microsoft.com (in reply to RCPT TO command))"

    and Client host is my IP public using to NAT. and i using ip 101.99.20.116 for email. so i dont know how to resolve it.

    Thursday, January 28, 2016 5:05 AM