Hello all, I have a data frame filled with senders and recipients. Some of the senders have multiple rows with different recipients and I want to merge those rows. For example I have a@email.com b@email.com a@email.com c@email.com d@email.com r@email.com f@email.com r@email.com h@email.com I want this to become a@email.com b@email.com c@email.com d@email.com r@email.com f@email.com h@email.com How would I go about doing this? [[alternative HTML version deleted]]