[MlMt] What's with the skulls?

[Sherif Soliman]

On 15 Feb 2019, at 20:45, John Cooper wrote:

> What's with the skulls that MailMate displays in the return addresses 
> of some messages?
>
> ![image](https://www.dropbox.com/s/iwfzu880yxqp4io/skulls.png)
>
> I've viewed the raw messages to try to figure out what prompts this 
> kind of display, but I only see an @ symbol.

This is something that MailMate does to help users detect @ symbols in 
the name part of an address header, which is one simple pattern of email 
spoofing. This blog post by Benny explains more:

https://blog.freron.com/2017/email-spoofing/

Quoting from the post:

> In the most recent test release of MailMate I’ve added the following 
> improvement: Whenever the name part of an address header contains a @ 
> then it’s replaced with a skull (💀). That should at least make 
> the user aware of simple attempts to spoof an address header.

Sherif
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