category: Mail requires: libopenssl100 cygwin external-source: libesmtp sdesc: "SMTP client library (runtime)" ldesc: "libESMTP is an SMTP client which manages posting (or submission of) electronic mail via a preconfigured Mail Transport Agent (MTA). It may be used as part of a Mail User Agent (MUA) or other program that must be able to post electronic mail but where mail functionality is not that program's primary purpose."