From the 1927 Paramount release book
"Never has a star leaped into instant popularity as has Eddie Cantor with his marvelous comedy performance in 'Kid Boots.'Love Letters would eventually surface as Special Delivery, directed by none other than Roscoe Arbuckle under his pseudonym "William Goodrich" with a cast that included William Powell and Harold Lloyd's frequent costar Jobyna Ralston (also soon to be Mrs. Richard Arlen). Sadly, I haven't seen Special Delivery, but I have seen Kid Boots, which is surprisingly funny, considering how important Cantor's vocal personality was to his act; on stage, radio and in his later sound films for Goldwyn. His silents are a promising start, to be sure.
The masses of movie fans have taken him to their hearts. In answer to unanimous demand from exhibitors and the public, Paramount now presents eddie Cantor in his second elaborate comedy production -- 'Love Letters.'
The hilarious adventures of a letter carrier who gets love letters mixed up with surprising results, packed with the inimitable Cantor gags."