There are some open pull requests that make changes to public interfaces:

• Break out SMTP Client Reset Method (Break out SMTP Client Reset Method go-gomail/gomail#79)
• Accept io.Reader for Attach and Embed (Accept io.Reader for Attach and Embed go-gomail/gomail#78) - This is specifically for changing signatures to the more idiomatic Attach/AttachFile and Embed/EmbedFile methods.

@pedromorgan: Could we make a next branch where we can stage these changes for a future v3 release branch?