Should I send both a thank you letter and thank you email after an interview for a fundraising position?

I just had an interview for a Development Officer position for a higher education institution. I've always sent both an email and mailed a card post interview, but I'm not sure if that is the preference of hiring managers, especially during pandemic days when so many staff are working remotely. Would it be better to just send an email? Or should I do both? Thanks in advance!

submitted by /u/Proper_Enthusiasm417
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