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MimeKit

SmtpClient(IProtocolLogger) Constructor

Initializes a new instance of the SmtpClient class.

Namespace: MailKit.Net.Smtp
Assembly: MailKit (in MailKit.dll) Version: 4.7.1
Syntax
C#
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public SmtpClient(
	IProtocolLogger protocolLogger
)

Parameters

protocolLogger  IProtocolLogger
The protocol logger.
Exceptions
ExceptionCondition
ArgumentNullExceptionprotocolLogger is null.
Remarks
Before you can send messages with the SmtpClient, you must first call one of the Connect methods. Depending on whether the SMTP server requires authenticating or not, you may also need to authenticate using one of the Authenticate methods.
Example
C#
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public static void SendMessage (MimeMessage message)
{
    using (var client = new SmtpClient (new ProtocolLogger ("smtp.log"))) {
        client.Connect ("smtp.gmail.com", 465, SecureSocketOptions.SslOnConnect);

        client.Authenticate ("username", "password");

        client.Send (message);

        client.Disconnect (true);
    }

    // Example log:
    // 
    // Connected to smtps://smtp.gmail.com:465/
    // S: 220 smtp.gmail.com ESMTP w81sm22057166qkg.43 - gsmtp
    // C: EHLO [192.168.1.220]
    // S: 250-smtp.gmail.com at your service, [192.168.1.220]
    // S: 250-SIZE 35882577
    // S: 250-8BITMIME
    // S: 250-AUTH LOGIN PLAIN XOAUTH2 PLAIN-CLIENTTOKEN OAUTHBEARER XOAUTH
    // S: 250-ENHANCEDSTATUSCODES
    // S: 250-PIPELINING
    // S: 250-CHUNKING
    // S: 250 SMTPUTF8
    // C: AUTH PLAIN AHVzZXJuYW1lAHBhc3N3b3Jk
    // S: 235 2.7.0 Accepted
    // C: MAIL FROM:<from.addr@gmail.com>
    // C: RCPT TO:<to.addr@gmail.com>
    // S: 250 2.1.0 OK w81sm22057166qkg.43 - gsmtp
    // S: 250 2.1.5 OK w81sm22057166qkg.43 - gsmtp
    // C: DATA
    // S: 354  Go ahead w81sm22057166qkg.43 - gsmtp
    // C: From: "LastName, FirstName" <from.addr@gmail.com>
    // C: Date: Thu, 27 Dec 2018 10:55:18 -0500
    // C: Subject: This is a test message
    // C: Message-Id: <C7GVXWE3C6U4.7ZQ0K9OUHTDP1@MADUNLA-SP4.northamerica.corp.microsoft.com>
    // C: To: "LastName, FirstName" <to.addr@gmail.com>
    // C: MIME-Version: 1.0
    // C: Content-Type: multipart/alternative; boundary="=-CToJI+AD2gS6z+fFlzDvhg=="
    // C: 
    // C: --=-CToJI+AD2gS6z+fFlzDvhg==
    // C: Content-Type: text/plain; charset=utf-8
    // C: Content-Transfer-Encoding: quoted-printable
    // C: 
    // C: This is the text/plain message body.
    // C: --=-CToJI+AD2gS6z+fFlzDvhg==
    // C: Content-Type: text/html; charset=utf-8
    // C: Content-Transfer-Encoding: quoted-printable
    // C: 
    // C: <html><body><center>This is the <b>text/html</b> message body.</center></body></html>
    // C: --=-CToJI+AD2gS6z+fFlzDvhg==--
    // C: 
    // C: .
    // S: 250 2.0.0 OK 1545926120 w81sm22057166qkg.43 - gsmtp
    // C: QUIT
    // S: 221 2.0.0 closing connection w81sm22057166qkg.43 - gsmtp
}
See Also