is_valid_email

Checks a pragmatic subset of RFC 5322 that catches real typos, not a full grammar.

Requires exactly one @, a non-empty local part of ASCII letters, digits and . _ % + - with no leading, trailing or doubled dot, and a domain of at least two dot-separated labels (ASCII letters, digits and hyphens, none starting or ending with a hyphen) whose last label is letters only. Quoted local parts, comments and internationalized domain names are not supported: this is meant to reject obvious mistakes, not to be the final word on deliverability.

Import

use helpers4::validate::is_valid_email;

Cargo feature validate (enabled by default). To compile only this module:

cargo add helpers4 --no-default-features --features validate

or in Cargo.toml:

[dependencies]
helpers4 = { version = "0.0.5", default-features = false, features = ["validate"] }

Signature

pub fn is_valid_email(s: &str) -> bool

Parameters

Parameter	Type	Description
s	&str	The address to check.

Returns

bool — true when s passes the checks above.

Examples

use helpers4::validate::is_valid_email;

assert!(is_valid_email("jane.doe+list@example.co.uk"));
assert!(!is_valid_email("no-at-sign"));
assert!(!is_valid_email("@example.com"));
assert!(!is_valid_email("jane@localhost"));

Source

src/validate/is_valid_email.rs