My email server does very thorough checking for SPF, DKIM, etc. Today
(for the first time) I received the digest with the title "***SPAM***
Discuss-gnuradio Digest, Vol 205, Issue 28". I use a web-based email
program (Roundcube) with no additional filtering.
I thought you would like to be aware of this.
--
Barry Duggan KV4FV