I just tried that, but it still said it found no messages to delete.
During my testing, I had tried just putting in a "Email - Get Messages" task using the same variable and giving it a specific folder (i.e. not the Inbox). That one actually did get some messages, but it was weird. It's set exactly the same way as the delete one that I've already posted screenshots of, except the conditions have Received Date Larger Than {DATENOWADD(Minutes,60,T)}. So to me, that should retrieve all messages in the "Automatically Filed/Transline CICO" folder that were received 60 minutes from now, which obviously means it should retrieve nothing because VC can't see into the future. What it actually retrieved was all messages from the inbox that were received at any point today.
Knowing that for whatever reason the Get Messages task wasn't reading the folder I told it to read, I thought maybe the Delete Messages task was also having the same issue. There are no messages in the inbox that are 45 days old - the oldest is about 28 or 29 days old. So I changed the date variable to {DATENOWADD(Days|-25|yyyy-MM-dd)} (which at this point would be Sept 29). This should have picked up all emails on or before Sept 29, which would be somewhere around 50 emails dating back to Sept 22. It still said it found no emails.