Forum Discussion
Tenant Allow/Block Lists Versus Anti-spam List
Thank you for your message. Although I have a corporate account, I am the sole tenant. I want my blocks to apply to me and anyone else that I decide to add to my corporate account. I find the Tenant Block/Allow List easier to input data than Anti-Spam policy lists. So that is what I will use going forward.
Regarding your questions if I have checked to see if spammy (a) has a consistent sending IP address range that (b) is not shared with many more legitimate senders?
I am not sure how to do that. I have enclosed four screenshots from two different spam emails from the same sender. 1-A and 1-B are two screenshots from Message Header Analyzer for one spam email. The same applies to my screenshots 2-A and 2-B.
The IP addresses differ slightly, but that they are probably from the same range. Are they shared with legitimate senders? I do not know.
I found it interesting that both spam emails passed SPF and dkim but not dmarc.
If these screenshots are exposing sensitive information, please let me know. I can either delete this post entirely or delete the attachments.