Typical gmail spam. They have been around for many years, google isn't able to 
stop them.

If you look at their headers, you'll notice that almost all of them have the 
same To: header as "undisclosed recipients" or pointing back to another gmail 
address. These characteristics make them very easy to block. Many many years 
ago, I came up with the following spamassassin rule to block them all and has 
been effective at blocking all of them:

header          __SPAM_GMAILG1     From =~ /\@(?:google|g)mail\.com\b/i
header          __SPAM_GMAILG2     To =~ /undisclosed/i
header          __SPAM_GMAILG3     To =~ /recipients/i
header          __SPAM_GMAILG4     To =~ /\@gmail\.com/i

meta            SPAM_GMAILG5       (__SPAM_GMAILG1 && (__SPAM_GMAILG2 || 
__SPAM_GMAILG3 || __SPAM_GMAILG4))
score           SPAM_GMAILG5       15.0
describe        SPAM_GMAILG5       Gmail spam (gmailg)


One warning: I've never seen legitimate emails from gmail with To: "undisclosed 
recipients" but if you happen to have such emails then the above rule won't be 
of help and will cause a lot of pain.



On Thu, 12 Jan 2023 00:08:12 +0100 Bjoern Franke via mailop <[email protected]> 
wrote:

> Hi,
> 
> recently some users on my private server get masses of Bitcoin spam from 
> Gmail.
> 
> Subjects like "Get__your__transaction__0.7495__BTC" with attached PDFs, 
> which contain an image with a link on the first page, and then pages of 
> nonsense like "And what about the intruder? Arthur, you know Mad-Eye, 
> said Mr. Diggory's head, rolling its eyes again. Someone creeping into 
> his yard in the dead of night? ..."
> 
> Senders like [email protected] don't sound like hijacked 
> accounts, but like especially created users for spamming.
> 
> Maybe Google could create some awareness for this type of users.
> 
> Best Regards
> Bjoern
> _______________________________________________
> mailop mailing list
> [email protected]
> https://list.mailop.org/listinfo/mailop
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