A second issue comes up also, moreover. As Internet standards--usually canonicalized in RFCs--have evolved, and as Python libraries have become more versatile and robust, some newer modules have superceded older ones. In a similar way, for example, the [re] module replaced the older [regex] module. In the interests of backwards compatibility, Python has not dropped any Internet modules from its standard distributions. Nonetheless, the [email] module represents current "best practice" for most tasks related to email and newsgroup message handling. The modules [mimify], [mimetools], [MimeWriter], [multifile], and [rfc822] are likely to be utilized in existing code, but for new applications, it is better to use the capabilities in [email] in their stead.