One of the recent spams arrived as a dual text/HTML message. Pegasus dutifully showed me the text version (one click to the HTML version, should you wish it), which ran
Your mailer do not support HTML messages. Switch to a better mailer.
Ah, the sense of desperation on the part of the person writing that! The idea that someone might not be able to click on the link to directly buy whatever it is they’re selling! Of course for me, pedant that I am, the topper was the bad grammar. If only all spam were so amusing.