I really do enjoy using CodeIgniter for a lot of my web development projects but sometimes I do get frustrated at the lack of simple things such as chaining especially with the email library. Not to mention, I have had a few problems with it on occasion. I recently decided to take a look at what PHP apps or libraries could easily integrate with PHP without so much as having to always write a "CI" library for integration to be successful..
For my first port of call, I immediately thought of Swift Mailer. I did search the web and found a library with tried to integrate Swift Mailer with CodeIgniter but guess what. It was for an old version of CodeIgniter and I felt the version of Swift Mailer used then was pretty old.