// +build !go1.5 package mail import "gopkg.in/alexcesaro/quotedprintable.v3" var newQPWriter = quotedprintable.NewWriter type mimeEncoder struct { quotedprintable.WordEncoder } var ( bEncoding = mimeEncoder{quotedprintable.BEncoding} qEncoding = mimeEncoder{quotedprintable.QEncoding} lastIndexByte = func(s string, c byte) int { for i := len(s) - 1; i >= 0; i-- { if s[i] == c { return i } } return -1 } )