SinriMailTextPost 1.0 for Mac was available to download from the developer's website when we last checked. We cannot confirm if there is a free download of this app available. This free Mac app was originally produced by Sinri Edogawa. The software lies within Developer Tools, more precisely Webmaster Tools. We recommend checking the downloaded files with any free antivirus.
From the developer:
SinriMailTextPost provides you a swift entrance to send simple e-mails through SMTP protocol. However, attachments are not supported yet. Furthermore, mail history would not be recorded. Only one receiver e-mail address is accepted for one e-mail. You can write the mail body as plain text while HTML code is supported.
You may want to check out more software for Mac, such as Url Extractor X, Boks or Navicat for Oracle, which might be related to SinriMailTextPost.