Spam.....
Also an interesting protein source.
Another term for unwanted sound is noise.
Assault
The term "spam" for unwanted email is derived from a Monty Python sketch in which the word "spam" is repeatedly mentioned in a restaurant menu, overwhelming the conversation. This comedic repetition mirrored the overabundance of unsolicited emails flooding users' inboxes, leading to the adoption of the term in the early days of the internet. The use of "spam" in this context became popular in the 1990s as a way to describe the intrusive nature of such emails.
An unwanted plant is a weed.
Spam.
The term 'email retention' is when a person or business keeps their emails. They will have an idea or guidelines on which emails need to be kept for their records.
Spam.
An air letter is another term for an aerogram - a letter sent by air mail.
Champion .
Waste Product
Phishing
Granary.