Binary package “libesmtp-dev” in ubuntu disco

LibESMTP SMTP client library (development files)

 LibESMTP is a library to manage posting (or submission of) electronic
 mail using SMTP to a preconfigured Mail Transport Agent (MTA) such as
 Exim. It may be used as part of a Mail User Agent (MUA) or another
 program that must be able to post electronic mail but where mail
 functionality is not the program's primary purpose.
 This package contains the header files and the static version
 of the library.