Abstract: Apparatuses, methods, and systems for generating subject lines for electronic messages of electronic campaigns. One method includes receiving, by a server, information related to the electronic campaign, preprocessing the received information, receiving a plurality of N subject lines generated based on the preprocess received information from a generative text engine model, reducing the N subject lines down to M subject lines, applying a fine-tuned enhancer model to enhance existing content for a selected one or more of the M subject lines, and displaying M subject lines with enhanced existing content to a merchant user. For an embodiment, reducing the N subject lines down to M subject lines includes filtering the N subject line to eliminate subject lines based on content, and generating similarity scores between each of the N subject lines and eliminating one or more subject lines based on a similarity with one or more other subject lines.