Editing Sendmail (section)

{{Short description|Open-source mail transfer agent}}
{{About|the mail transfer agent|the company|Sendmail, Inc.}}
{{More footnotes|date=November 2019}}
{{Infobox software
| name = Sendmail
| logo = Sendmail.org_small_logo.gif<!-- Image name is enough -->
| logo size = 214px
| logo alt = 
| screenshot = <!-- Image name is enough -->
| caption = 
| screenshot alt = 
| collapsible = 
| author = [[Eric Allman]]
| developer = Sendmail Consortium, [[Proofpoint, Inc.]]
| released = {{Start date and age|1983}}
| discontinued = 
| latest release version = 8.18.1<ref>{{cite web| url = https://ftp.sendmail.org/RELEASE_NOTES| title = Release Notes}}</ref>
| latest release date = {{Start date and age|2024|01|31}}
| latest preview version =
| latest preview date =
| programming language = 
| operating system = [[Cross-platform]]
| platform = 
| size = 
| language = 
| language count = <!-- Number only -->
| language footnote = 
| genre = [[Mail transfer agent]]
| license = [https://www.proofpoint.com/sites/default/files/sendmail-license.pdf Sendmail License]
| alexa = 
| website = {{URL|https://www.proofpoint.com/us/products/open-source-email-solution}}
| standard = 
| AsOf = 
}}
'''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]].