What is the address block line limit? In line with Royal Mail specifications, imail items have a maximum of seven address lines. By Ryan Hodson|2021-09-06T11:40:30+00:00September 6th, 2021|Support & Technical Queries|0 Comments Share This Story, Choose Your Platform! FacebookTwitterRedditLinkedInWhatsAppTumblrPinterestVkEmail About the Author: Ryan Hodson Helping clients simplify the sending of postal and digital critical communications. Leave A Comment Cancel replyYou must be logged in to post a comment.