Email Security.cloud

Hello,

The client's Mail server IP is not blacklisted in any major RBLs. Also, there is no recent spamming from their IP.

But messagelabs.com blocks the IP without providing any error messages.

From client server,
------------------------------------

# nc -v cluster5.us.messagelabs.com 25
nc: connect to cluster5.us.messagelabs.com port 25 (tcp) failed: Connection timed out

------------------------------------

From another server, we are able to connect without any issues.

------------------------------------

# nc -v cluster5.us.messagelabs.com 25
Connection to cluster5.us.messagelabs.com 25 port [tcp/smtp] succeeded!
220 server-15.tower-119.messagelabs.com ESMTP

------------------------------------

Please advise , how we can solve the issue.

Thanks in advance.

Hello QHO Support,

Would you have more technical information we can investigate with, such as IP details? Elaborating further, what is the domain in question? and do you have a ClientNet ID we can raise a cloud case with?

Do you also have a number we can contact you or email address we can reach out with? Please reach our global support numbers below and we can begin troubleshooting this connectivity issue further.

Kind regards,

Timothy Wong

Technical Support Engineer, Symantec Corporation

Gateway Security Group

www.symantec.com
________________________________

Raise a support ticket online

US/Canada: +1 (866) 807 6047
EMEA: +44 (0) 870 850 3014
Australia: 1 (800) 088 099
Hong Kong: +852 6902 1130
Asia Pacific: +852 6902 1130

Hello.

I'm having the same problem.

This is in my mail queue:

54E7FFE8EB    17808 Tue Oct 27 10:26:50  visit@visitkosice.eu
(connect to cluster8.eu.messagelabs.com[85.158.140.195]:25: Connection timed out)
Telnet to the IP 85.158.140.195:25 times out from the mailserver, but connects from my PC.

http://ipremoval.sms.symantec.com/lookup/ :
The IP address you submitted, 188.120.1.49, does not have a negative reputation and therefore cannot be submitted for investigation.

Thanks
Regards

Marek

Hi Marek,

This kind of symptoms can be related to IP throttling done by the Symantec.Cloud infrastructure. This would normally occur if the IP is or was detected as being compromised, sending spam, etc. I would recommend you reach out to one of your contact using the Symantec.Cloud email filtering service and to have them open a ticket with Cloud support for assistance.

Alternatively, you can reach out to cloud support. Since the service is largely client managed, it is typically best to reach out to the recipient, however since each case is unique they may be able to provide you with valued feedback on your situation.

support.cloud@symantec.com

Regards,

Ben B