Halon is a commercial scriptable

SMTP The Simple Mail Transfer Protocol (SMTP) is an Internet standard communication protocol for electronic mail transmission. Mail servers and other message transfer agents use SMTP to send and receive mail messages. User-level email clients typical ...

server. It's available for

Linux Linux ( or ) is a family of open-source Unix-like operating systems based on the Linux kernel, an operating system kernel first released on September 17, 1991, by Linus Torvalds. Linux is typically packaged as a Linux distribution, which ...

as well as a software distribution based on

FreeBSD FreeBSD is a free and open-source Unix-like operating system descended from the Berkeley Software Distribution (BSD), which was based on Research Unix. The first version of FreeBSD was released in 1993. In 2005, FreeBSD was the most popular ...

. The

web hosting A web hosting service is a type of Internet hosting service that hosts websites for clients, i.e. it offers the facilities required for them to create and maintain a site and makes it accessible on the World Wide Web. Companies providing web h ...

provider One.com uses Halon which operates some of the most active (on the basis of the number of domains they support) mail servers. Like Postfix it supports

DANE Dane or Danes may refer to: People Pertaining to Denmark * Dane, somebody from Denmark * Danes, an ethnic group native to Denmark * Danes (Germanic tribe) Other people * Dane (name), a surname and a given name (and a list of people with the nam ...

, as well as the draft for MTA-STS, for encrypted email transfer. It provides other email security features such as

spam Spam may refer to: * Spam (food), a canned pork meat product * Spamming, unsolicited or undesired electronic messages ** Email spam, unsolicited, undesired, or illegal email messages ** Messaging spam, spam targeting users of instant messaging ( ...

filtering from

CYREN Cyren Inc. is a cloud-based, Internet security technology company providing security as a service (SECaaS) and threat intelligence services to businesses. Web security, DNS security, cloud sandboxing, inbound/outbound anti-spam services, real ...

DMARC Domain-based Message Authentication, Reporting and Conformance (DMARC) is an email authentication protocol. It is designed to give email domain owners the ability to protect their domain from unauthorized use, commonly known as email spoofing. Th ...

and

DKIM DomainKeys Identified Mail (DKIM) is an email authentication method designed to detect forged sender addresses in email (email spoofing), a technique often used in phishing and email spam. DKIM allows the receiver to check that an email claimed ...

. Like MailChannels, it supports transparent operation in order to filter spam coming out of servers not administered by the provider.

References

Message transfer agents {{software-stub

See also

References