Please whitelist cPanel in your adblocker so that you’re able to see our version release promotions, thanks!

The Community Forums

Interact with an entire community of cPanel & WHM users!

Mail delivery failed: returning message to sender

Discussion in 'E-mail Discussion' started by conductexam, Oct 30, 2018.

Tags:
  1. conductexam

    conductexam Member

    Joined:
    Aug 9, 2018
    Messages:
    12
    Likes Received:
    0
    Trophy Points:
    1
    Location:
    rajkot
    cPanel Access Level:
    Root Administrator
    Hello there,
    Code:
    Reporting-MTA: dns; host.domain.com
    
    Action: failed
    Final-Recipient: rfc822;someusr@outlook.com
    Status: 5.0.0
    Remote-MTA: dns; outlook-com.olc.protection.outlook.com
    Diagnostic-Code: smtp; 550 5.7.1 Unfortunately, messages from [server-ip] weren't sent. Please contact your Internet service provider since part of their network is on our block list (S3140). You can also refer your provider to Troubleshooting. [BY2NAM05FT021.eop-nam05.prod.protection.outlook.com]
    
    How to solve this ?
     
    #1 conductexam, Oct 30, 2018
    Last edited by a moderator: Oct 30, 2018
  2. GOT

    GOT Get Proactive! PartnerNOC

    Joined:
    Apr 8, 2003
    Messages:
    1,453
    Likes Received:
    178
    Trophy Points:
    193
    Location:
    Chesapeake, VA
    cPanel Access Level:
    DataCenter Provider
    Your IP is blacklisted with Microsoft related domains. You can request a delisting but in my experience they are pretty non=responsive. It generally means your server has been sending spam.

    You might consider an outgoing mail filter such as mailchannels.com. And you should look at your mail queue and logs to see what the souce of the sam is and make sure that it is stopped.
     
    Stop hovering to collapse... Click to collapse... Hover to expand... Click to expand...
  3. webhostuk

    webhostuk Well-Known Member

    Joined:
    Sep 11, 2013
    Messages:
    148
    Likes Received:
    15
    Trophy Points:
    18
    Location:
    UK
    cPanel Access Level:
    Website Owner
    Twitter:
    The email states your ISP provider IP from where you are trying to send the email is blocked. unless you get a different IP or unblock your present IP you cannot send email.
     
    Stop hovering to collapse... Click to collapse... Hover to expand... Click to expand...
  4. cPanelMichael

    cPanelMichael Technical Support Community Manager Staff Member

    Joined:
    Apr 11, 2011
    Messages:
    47,272
    Likes Received:
    2,154
    Trophy Points:
    363
    cPanel Access Level:
    Root Administrator
    Twitter:
    Stop hovering to collapse... Click to collapse... Hover to expand... Click to expand...
  5. PCZero

    PCZero Well-Known Member

    Joined:
    Dec 13, 2003
    Messages:
    633
    Likes Received:
    66
    Trophy Points:
    178
    Location:
    Earth
    Micheal I just recently started having this EXACT same issue on my server. I am really not sure at all what to do even following the step in the link you provided. When I test the server hostname I get no blocks listed at all. When I test the server's main IP I do get so listing but I have no idea at all what they are telling me. I am sending you additional info via message.
     
  6. cPanelMichael

    cPanelMichael Technical Support Community Manager Staff Member

    Joined:
    Apr 11, 2011
    Messages:
    47,272
    Likes Received:
    2,154
    Trophy Points:
    363
    cPanel Access Level:
    Root Administrator
    Twitter:
    Hi @PCZero,

    If Microsoft/Outlook is blocking email from your server, you'll need to go through their troubleshooting steps per the Microsoft section at:

    Tutorial - How do I check if my mail server is blacklisted?

    Since Microsoft is blocking the email, you must go through them to determine what must be done to remove the block.

    Thank you.
     
    Stop hovering to collapse... Click to collapse... Hover to expand... Click to expand...
Loading...

Share This Page

  1. This site uses cookies to help personalise content, tailor your experience and to keep you logged in if you register.
    By continuing to use this site, you are consenting to our use of cookies.
    Dismiss Notice