要在 SDF 使用电子邮箱，你需要用已验证的用户账号。
默认的电子邮箱地址是你的 SDF 用户名，域名则是 sdf.org。例：ldbeth 的邮箱地址是 firstname.lastname@example.org。
在 SDF 可用的邮件程序有很多，它们的操作方式都差不多。包括但不限于：
mailx System 7 standard mail client. Very minimal, but quick and useful. You could use it from a teletype. rmail (emacs -f rmail) East Coast mail / babyl reader pine West Coast mail reader. Actually incorporates MM (from TOPS-20) as its core, though you'd probably never know that. Slow, but user friendly. alpine A complete recode of pine. Supposed to fix all of pines problems but probably just makes new ones. elm A simple and easy mail reader. Though, has a tendancy to barf on MIME encoded attachments. mutt A stripped down version of elm, but with better support for MIME encoded attachments. nmh A powerful message handling system consists a collection of simple single-purpose programs.