SMTP
The core protocol for email transmission. Its fundamental architecture has remained largely unchanged since the publication of RFC 821 in 1982, and it continues to serve as the foundational standard for modern email systems.
Core Facts
Modern email is built on the SMTP protocol, whose core architecture has undergone almost no fundamental changes since the publication of RFC 821 in 1982.
The SMTP protocol was born in 1982 and is responsible for the sending and relay transmission of emails.
The IMAP protocol was proposed in 1986, allowing clients to directly manage emails on the server and supporting multi-device synchronization.
Timeline (last 90 days)
The SMTP approach depends on Gmail's sending limits, and high-frequency use may trigger restrictions.
SMTP is the de facto standard protocol for sending email, with a default plaintext port of 25 and encrypted ports of 465 (SSL) or 587 (STARTTLS).
SASL (Simple Authentication and Security Layer) is an authentication framework decoupled from specific authentication algorithms, and is widely used in protocols such as SMTP, LDAP, and XMPP.
After the proliferation of spam in the 2000s, major service providers introduced IP-reputation-based filtering mechanisms, forming an implicit trust network centered on the whitelists of a small number of large service providers.
Email is built on open protocols such as SMTP, IMAP, and POP3, which do not belong to any single company.
Gmail, combined with SMTP settings, can be configured to send emails using a custom domain email address.
SMTP was first defined in 1982 in RFC 821, with the design led by Jon Postel.
Stalwart 是一个用 Rust 编写的现代邮件服务器，支持 JMAP、IMAP4、SMTP 等协议
SMTP 协议在设计之初（RFC 821，1982年，由 Jon Postel 撰写）没有考虑身份验证问题，任何人都可以声称自己是任何发件人
SMTP 协议诞生于 1982 年
1 more timeline events
All Facts (13)
Modern email is built on the SMTP protocol, whose core architecture has undergone almost no fundamental changes since the publication of RFC 821 in 1982.
75%VerifiedThe SMTP protocol was born in 1982 and is responsible for the sending and relay transmission of emails.
75%VerifiedThe IMAP protocol was proposed in 1986, allowing clients to directly manage emails on the server and supporting multi-device synchronization.
65%UnverifiedThe SMTP approach depends on Gmail's sending limits, and high-frequency use may trigger restrictions.
50%UnverifiedSMTP is the de facto standard protocol for sending email, with a default plaintext port of 25 and encrypted ports of 465 (SSL) or 587 (STARTTLS).
50%UnverifiedSASL (Simple Authentication and Security Layer) is an authentication framework decoupled from specific authentication algorithms, and is widely used in protocols such as SMTP, LDAP, and XMPP.
50%UnverifiedAfter the proliferation of spam in the 2000s, major service providers introduced IP-reputation-based filtering mechanisms, forming an implicit trust network centered on the whitelists of a small number of large service providers.
50%UnverifiedEmail is built on open protocols such as SMTP, IMAP, and POP3, which do not belong to any single company.
50%UnverifiedGmail, combined with SMTP settings, can be configured to send emails using a custom domain email address.
50%UnverifiedSMTP was first defined in 1982 in RFC 821, with the design led by Jon Postel.
50%UnverifiedStalwart 是一个用 Rust 编写的现代邮件服务器，支持 JMAP、IMAP4、SMTP 等协议
50%UnverifiedSMTP 协议在设计之初（RFC 821，1982年，由 Jon Postel 撰写）没有考虑身份验证问题，任何人都可以声称自己是任何发件人
50%UnverifiedSMTP 协议诞生于 1982 年
50%