Postfix
E792075
Postfix is a widely used open-source mail transfer agent (MTA) for Unix-like systems, designed as a secure, fast, and easy-to-administer alternative to Sendmail.
All labels observed (3)
| Label | Occurrences |
|---|---|
| Postfix canonical | 5 |
| Postfix (with configuration) | 1 |
| https://www.postfix.org/ | 1 |
How this entity was disambiguated
This entity first appeared as the object of triple T9312023 — resolving that mention is where its identity was fixed. The disambiguator weighed these candidate entities and picked the highlighted one (or “None”, minting a new entity). This is how homonymy is resolved: the same surface form can point to different entities.
NED1
Entity disambiguation (via context triple)
gpt-5-mini-2025-08-07
Target entity: Postfix Context triple: [qmail, influenced, Postfix]
-
A.
SMTP
SMTP (Simple Mail Transfer Protocol) is a standard communication protocol used for sending and routing email messages across IP networks.
-
B.
POP3
POP3 (Post Office Protocol version 3) is a standard email protocol used by clients to retrieve messages from a remote mail server over a TCP/IP network, typically downloading them for local storage.
-
C.
qmail
qmail is a secure, high-performance mail transfer agent for Unix-like systems, designed as an alternative to Sendmail with a strong focus on reliability and security.
-
D.
fetchmail
fetchmail is a widely used open-source remote mail retrieval and forwarding utility for Unix-like systems, designed to fetch email from POP/IMAP servers and deliver it to local mail clients or servers.
-
E.
Posta
Posta is a popular Turkish daily newspaper known for its mass-market appeal and wide circulation.
- F. None of above. chosen
- G. Unsure - the case is ambiguous/there is not enough information to decide.
NED2
Entity disambiguation (via description)
gpt-5-mini-2025-08-07
Target entity: Postfix Target entity description: Postfix is a widely used open-source mail transfer agent (MTA) for Unix-like systems, designed as a secure, fast, and easy-to-administer alternative to Sendmail.
-
A.
SMTP
SMTP (Simple Mail Transfer Protocol) is a standard communication protocol used for sending and routing email messages across IP networks.
-
B.
POP3
POP3 (Post Office Protocol version 3) is a standard email protocol used by clients to retrieve messages from a remote mail server over a TCP/IP network, typically downloading them for local storage.
-
C.
qmail
qmail is a secure, high-performance mail transfer agent for Unix-like systems, designed as an alternative to Sendmail with a strong focus on reliability and security.
-
D.
fetchmail
fetchmail is a widely used open-source remote mail retrieval and forwarding utility for Unix-like systems, designed to fetch email from POP/IMAP servers and deliver it to local mail clients or servers.
-
E.
Posta
Posta is a popular Turkish daily newspaper known for its mass-market appeal and wide circulation.
- F. None of above. chosen
Statements (52)
| Predicate | Object |
|---|---|
| instanceOf |
free and open-source software
ⓘ
mail transfer agent ⓘ |
| architecture | modular ⓘ |
| component |
anvil
ⓘ
bounce ⓘ cleanup ⓘ local ⓘ pickup ⓘ qmgr ⓘ scache ⓘ smtp ⓘ smtpd ⓘ trivial-rewrite ⓘ |
| configurationFile |
/etc/postfix/main.cf
ⓘ
/etc/postfix/master.cf ⓘ |
| designedAs |
easy-to-administer alternative to Sendmail
ⓘ
fast alternative to Sendmail ⓘ secure alternative to Sendmail ⓘ |
| developer | Wietse Venema ⓘ |
| focusesOn |
ease of administration
ⓘ
performance ⓘ security ⓘ |
| homepage |
https://www.postfix.org/
ⓘ
linked to:
Postfix
|
| includedIn | many Linux distributions by default ⓘ |
| license |
Eclipse Public License
ⓘ
IBM Public License ⓘ |
| operatingSystem |
BSD
ⓘ
Linux ⓘ Unix-like systems ⓘ macOS ⓘ |
| originallyDevelopedAt | IBM Research ⓘ |
| programmingLanguage | C ⓘ |
| replaces | Sendmail ⓘ |
| supportsFeature |
DKIM integration via external tools
ⓘ
SASL authentication ⓘ SMTP relay control ⓘ SPF checking via external policy services ⓘ TLS encryption ⓘ address rewriting ⓘ content filtering ⓘ greylisting via external policy services ⓘ mail queuing ⓘ mailbox delivery ⓘ virtual domains ⓘ |
| supportsLookupTable |
LDAP
ⓘ
MySQL ⓘ PostgreSQL ⓘ SQLite ⓘ btree ⓘ hash ⓘ |
| supportsProtocol |
ESMTP
ⓘ
SMTP ⓘ |
How these facts were elicited
The pipeline generated the facts above by prompting gpt-5.1 with this entity's name + description and the instruction below.
Instruction
You are a knowledge base construction expert. Given a subject entity and a description of it, return factual statements that you know for the subject as a JSON list of dictionaries(triples), where keys must be "subject", "predicate" and "object". The number of facts may be very high, between 25 to 50 or more, for very popular subjects. For less popular subjects, the number of facts can be very low, like 5 or 10. # Requirements - If you don't know the subject at all, return an empty list. - If the subject is not a named entity, return an empty list. - Include at least one triple where predicate is "instanceOf". - Do not get too wordy. - Separate several objects into multiple triples with one object.
Input
Subject: Postfix Description of subject: Postfix is a widely used open-source mail transfer agent (MTA) for Unix-like systems, designed as a secure, fast, and easy-to-administer alternative to Sendmail.
Referenced by (7)
Full triples — surface form annotated when it differs from this entity's canonical label.
linked to: Postfix