IMAP search for email address in the from field
print('search with name')
status, results = con.search(None, '(FROM "Shrikant Sharat")')
if status == 'OK':
    if results[0]:
        mid = results[0].split()[0]
        print('mail id', mid)
        print(con.fetch(mid, '(UID BODY[HEADER.FIELDS (FROM)])'))
    else:
        print('No results yielded')
else:
    print('unable to search', results)

print()
print('search with email')
status, results = con.search(None, '(FROM "shrikantsharat.k@gmail.com")')
if status == 'OK':
    if results[0]:
        mid = results[0].split()[0]
        print('mail id', mid)
        print(con.fetch(mid, '(UID BODY[HEADER.FIELDS (FROM)])'))
    else:
        print('No results yielded')
else:
    print('unable to search', results)

search with name
mail id 2155
('OK', [('2155 (UID 5340 BODY[HEADER.FIELDS (FROM)] {54}', 'From: Shrikant Sharat <shrikantsharat.k@gmail.com>rnrn'), ' FLAGS (\Seen))'])

search with email
No results yielded

(HEADER FROM "shrikantsharat.k@gmail.com")