Should be OK now! There's just a small typo you can fix ("lates"), and you didn't provide a changelog. Given how many versions have been skipped, I think it's safe to just add Changelog available [here](https://marlam.de/msmtp/news/) from X to Y. in the Summary.
There's not an enforced format by the way, only some common templates.
@JoshStrobl Sorry to say, but I'm getting a bit frustrated to wait that long for a quite simple update to get merged. Just wanted to help and contribute to the Solus project, but I get the feeling that my help is not much appreciated.
It also makes me worry to see packages in the repository without any updates since years, which could cause potential security risks (not in this case, but maybe for other packages).