SMTP error from remote mail server after pipelined MAIL 550 5.7.1 Unfortunately

[Muneef]

This message was created automatically by mail delivery software.

A message that you sent could not be delivered to one or more of its
recipients. This is a permanent error. The following address(es) failed:

[email protected]
host live-com.olc.protection.outlook.com [xxxxx]
SMTP error from remote mail server after pipelined MAIL FROM:<[email protected]> SIZE=13783:
550 5.7.1 Unfortunately, messages from [xxxxx] 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 http://mail.live.com/mail/troubleshooting.aspx#errors. [HE1EUR02FT014.eop-EUR02.prod.protection.outlook.com]


Attachment blocked - file type not allowed.

Attachment blocked - file type not allowed.

 

[ZenHostingTravis]

Hi @Muneef,

Unfortunately the IP address of the server you are using has been blacklisted by Outlook and that is why email is bouncing.

You should contact your service provider if it's a shared server that your website resides on.

If it's not a shared server, you should investigate why an IP has been blacklisted. You can be blacklisted if a website, for example, relays spam. You can go to the following link to request your IP be removed from the blacklist: Delist IP - Delist IP It might be worthwhile looking into using a SMTP relay such as SMTP2GO.

Hope that helps!

 

[cPanelAaronH]

Thanks for helping out @ZenHostingTravis

"Please contact your Internet service provider since part of their network is on our block list (S3140)." does provide this information. You may be able to request a different IP, but you can likely work with your host to have the IP delisted.

IP and Domain Reputation Center || Cisco Talos Intelligence Group - Comprehensive Threat Intelligence

Talos have world's most comprehensive IP and Domain Reputation Center for real-time threat detection.

talosintelligence.com

May provide some additional information on the IP address as well.

 

[ZenHostingTravis]

I'm happy to try and help @cPanelAaronH.

If it is a shared server @Muneef, your host should do all the "heavy lifting" such as the delisting request itself.

 

[Muneef]

HI,

When I checking with Delist IP - Delist IP its not showing any blocking IP and the same as Cisco Talos Intelligence Group - Comprehensive Threat Intelligence

 

[cPRex]

@Muneef - I like to use Email Blacklist Check - IP Blacklist Check - See if your server is blacklisted for most things, and MultiRBL.valli.org - Blacklist, Whitelist and FCrDNS check tool for a more thorough scan of blacklists.

 

[Muneef]

I checked its not worked .

 

[cPRex]

I'm not sure what you're seeing that isn't working at this time. Can you let me know what isn't working?

 

[Muneef]

Router:	dkim_lookuphost
Transport:	dkim_remote_smtp
Out Time:	Dec 1, 2020, 3:37:03 AM
ID:	1kk3yK-00058A-Ri
Delivery Host:	live-com.olc.protection.outlook.com
Delivery IP:	XXXXXXXXX
Size:	44.33 KB
Result:	SMTP error from remote mail server after pipelined MAIL FROM:<[email protected]> SIZE=47269: 550 5.7.1 Unfortunately, messages from [XXXXXX] 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. [BN8NAM12FT054.eop-nam12.prod.protection.outlook.com]

 

[cPRex]

Thanks for those details. That indicates the IP address you are trying to send mail from is being blocked by Microsoft. You'll want to ensure your server isn't being used to send spam messages, and then work with your hosting provider to get removed from Microsoft's blacklist, but you won't be able to resolve either of these issues using any cPanel tools.

 

[Muneef]

Okay, I will check with Microsoft office

 

[cPRex]

That sounds good - if you do run into anything else or need more details, just ask!