[MlMt] rule (or some way) to delete all prior messages from same sender as selected message?

[David Green]

On 19 Jun 2018, at 8:45, Eric Sharakan wrote:

>> For now, you could, e.g., double-click the sender (or maybe the 
>> subject) and then hit ⌘A before hitting delete. Then hit escape to 
>> return to the mailbox.
>
> That's pretty much exactly what I do now, except I want to keep the 
> most recent message rather than delete them all, so I can't use ⌘A.

Just nipping at the edges of your request but you could ⌘A and then 
⌘+click on the one you want to keep to deselect it before hitting 
delete.