A Swift implementation of an international email address syntax validator based on RFC5321 & RFC5322
SwiftEmailValidator
A Swift implementation of an international email address syntax validator based on RFC5321 & RFC5322. Since email addresses are
local @ remote the validator also includes IPAddressSyntaxValidator and EmailHostSyntaxValidator classes. This
Swift Package does not require an Internet connection at runtime and is entirely self contained.
RFC5321 – Simple Mail Transfer Protocol
https://datatracker.ietf.org/doc/html/rfc5321
RFC5322 – Internet Message Format
https://datatracker.ietf.org/doc/html/rfc5322
Domains are validated against the Public Suffix List at https://publicsuffix.org . To update the built-in suffix list
(PublicSuffixRulesRegistry.swift) use the Utilities/update-suffix.swift script.
Public Suffix List last updated on 2022-01-22 10:48:00 EST
EmailSyntaxValidator
if EmailSyntaxValidator.match("email@example.com") {
print("email@example.com respects Email syntax rules")
}
IPAddressSyntaxValidator
if IPAddressSyntaxValidator.matchIPv6("::1") {
print("::1 is a valid IPv6 address")
}
if IPAddressSyntaxValidator.matchIPv4("127.0.0.1") {
print("127.0.0.1 is a valid IPv4 address")
}
if IPAddressSyntaxValidator.match("8.8.8.8") {
print("8.8.8.8 is a valid IP address")
}
if IPAddressSyntaxValidator.match("fe80::1") {
print("fe80::1 is a valid IP address")
}
EmailHostSyntaxValidator
Validates if the email’s host name is following expected syntax rules and whether it is part of a known public suffix. Does NOT validate if the domain actually exists or even allowed by the registrar.
if EmailHostSyntaxValidator.match("yahoo.com") {
print("yahoo.com has valid email host syntax")
}