Unable to send email to messagelabs client

[Piotr Wojnarowicz]

Hello,

We're unable to send email to mesagelabs customer. Our server IP is  51.68.146.235

Our customer MXs are:

play.pl mail is handled by 10 cluster1.eu.messagelabs.com.
play.pl mail is handled by 20 cluster1a.eu.messagelabs.com.

Emails are received by messagelabs servers, but few seconds later I receive error: 

Reason: 521 5.2.1 Error: True Source IP has bad reputation

 

I've written to [e-mail] , but nobody is responding. Who should I contact to be able to send emails? We have set SPF, DKIM, DMARC and all others customers receive emails without problem.

 

 

[ℬrίαη]

This is all that's provided for non-customers:

Links for reference:

https://www.symantec.com/docs/TECH82881

https://www.symantec.com/docs/TECH250089

https://www.symantec.com/docs/TECH240145

[Piotr Wojnarowicz]

Thank you for an answer. I understand that Symantec wants to sent information via [e-mail] email and I did it a few days ago. Unfortunately nobody answers the email and that's why I try to find help here.

I know that previous owner of IP was a spammer, but since I got this address 2 weeks ago everything was reinstalled and configured properly.

[ℬrίαη]

The link states it may take up to 7 days to complete the investigation. Symantc employees do frequent this forum so hopefully one sees this hread. Only they can fix this.

[Piotr Wojnarowicz]

Has anyone from Symantec employees seen this post? It's already 9 working days since I've written first email to [e-mail] and problem is still not fixed neither I received any answer.

[Piotr Wojnarowicz]

Does anyone work in here? Problem is still not solved, Does it mean that email security.cloud has been abandoned? I sent emails to [e-mail] more than 3 weeks ago and still didn't receive any answer.

[ℬrίαη]

This fourm does not provide official support and since you're not a customer it's more difficult. Again, hopefully someone from symc see's this.