check-if-email-exists 0.8.28

check-if-email-exists lets you check if an email address exists without sending any email.

Under the hood, it connects to the email address's SMTP server, and, analyzing the server's responses against some SMTP commands, finds out information about the email address, such as:

• Email deliverability: Is an email sent to this address deliverable?
• Syntax validation. Is the address syntactically valid?
• DNS records validation. Does the domain of the email address have valid MX DNS records?
• Disposable email address (DEA) validation. Is the address provided by a known disposable email address provider?
• SMTP server validation. Can the mail exchanger of the email address domain be contacted successfully?
• Mailbox disabled. Has this email address been disabled by the email provider?
• Full inbox. Is the inbox of this mailbox full?
• Catch-all address. Is this email address a catch-all address?

use check_if_email_exists::{check_email, CheckEmailInput, CheckEmailInputProxy};

async fn check() {
// Let's say we want to test the deliverability of someone@gmail.com.
let mut input = CheckEmailInput::new(vec!["someone@gmail.com".into()]);

// Optionally, we can also tweak the configuration parameters used in the
// verification.
input
.set_from_email("me@example.org".into()) // Used in the `MAIL FROM:` command
.set_hello_name("example.org".into())    // Used in the `EHLO` command
.set_smtp(587)                           // Use port 587 instead of 25
.set_proxy(CheckEmailInputProxy {        // Use a SOCKS5 proxy to verify the email
host: "my-proxy.io".into(),
port: 1080
});

// Verify this input, using async/await syntax.
let result = check_email(&input).await;

// `result` is a `Vec<CheckEmailOutput>`, where the CheckEmailOutput
// struct contains all information about one email.
println!("{:?}", result);
}