Hi folks,

I am a presales working in ST Electronics (Info Comm Systems) Pte Ltd, a partner with CISCO. However, my email had delivery issue when I send to any CISCO personnel. Please kindly help to resolve my email issue with your side. Thanks.

Error as followed:

The following message to was undeliverable.
The reason for the problem:
5.1.0 - Unknown address error 550-'Connections from the host mengtze.stee.com.sg (61.8.252.34), originating from SenderBase Network Owner ID: 88377, are being rejected due to a low SenderBase Reputation Score. See http://www.senderbase.org for more information or contact your IT support team.'