levi
Still fresh, damnit!
Hmm, looks like you're right, but I'm gonna stick with my tenses explanation. I/you/he/they send a letter (present tense). The 'sends' form is apparently the indicative tense, but still present tense.
It's because these footers are written in the past tense, the verb becomes 'sent'.
It's because these footers are written in the past tense, the verb becomes 'sent'.