蜗牛邮件（英语：snail mail），是一个返璞词，指电子信息时代出现之前的所有邮件都可以称之为蜗牛邮件。

蜗牛邮件的称呼来源于和电子邮件相比：相比于电子邮件的超级快速，传统邮件的送达速度显然很慢。

所有蜗牛邮件也可以叫纸质邮件、传统邮件或者普通邮件。

Snail mail and smail (from snail + mail)—named after the snail with its slow speed—refers to letters and missives carried by conventional postal delivery services. The phrase refers to the lag-time between dispatch of a letter and its receipt, versus the virtually instantaneous dispatch and delivery of its electronic equivalent, e-mail.