Email Security.cloud

Hi,

We have blocked the email and domain of a company that is sending us spam constantely, but we are still receiving emails from them.

Is their a setting or change we need to make in order to stop this?

We have blocked other domsina before and this has not proved to be a issue like this is turning out to be.

Tthanks

Are they masquearding the domain? Perhaps you can compare the internet headers and share any one here for experts to look and share their views.

In the same vein, MessageLabs blocking works on the envelope (smtp) sender, not the From: header.  If the mail you are receiving has a different email address in the smtp sender to the one in the From header, you will need to block that.

You can find out what the envelope sender is by looking at the headers to find the X-Env-Sender header which MessageLabs inserts.

The other thing you could do if this is a genuine company sending you mail rather than a botnet is block their IP address.