Sendmail
| Sendmail | |
|---|---|
| Original author(s) | Eric Allman | 
| Developer(s) | Sendmail Consortium, Proofpoint, Inc. | 
| Initial release | 1983 | 
| Stable release | 8.18.1
   / January 31, 2024 | 
| Operating system | Cross-platform | 
| Type | Mail transfer agent | 
| License | Sendmail License | 
| Website | www | 
Sendmail is a general purpose internetwork email routing facility that supports many kinds of mail-transfer and delivery methods, including the Simple Mail Transfer Protocol (SMTP) used for email transport over the Internet.
A descendant of the delivermail program written by Eric Allman, Sendmail is a well-known project of the free and open source software and Unix communities. It has spread both as free software and proprietary software.