質問編集履歴
2
参考にしたサイトの追加
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@@ -10,6 +10,10 @@
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よろしくお願いします。
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今回のコードを書くにあたって主に、
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[JavaアプリケーションからEメールを送信するサンプルコード](https://qiita.com/rubytomato@github/items/b106ff8011bcad60bce2)
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を参考にさせていただきました。
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以下はメールを送るメソッドです。メールアドレスやパスワードのところは*で埋めてます。
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実行にはEclipseを使用しています。
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1
ソースコードとデバッグのログを追加しました。
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@@ -5,7 +5,165 @@
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5
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システム上、本文がそれぞれ違うものを数十通送る可能性もあるのですが、数十件も送っていると数分かかってしまうので、
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できるだけ早く送信したいのですが何かいい方法はないでしょうか。
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メール送信のAPIはJavaMailを使用しています。
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メール送信のAPIはJavaMail ver1.6.1を使用しています。
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現在macbook airで開発しており、今後は大学内のサーバPCを使うかもしれません。
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よろしくお願いします。
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よろしくお願いします。
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以下はメールを送るメソッドです。メールアドレスやパスワードのところは*で埋めてます。
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実行にはEclipseを使用しています。
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```java
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public void send(String subject, String content, String to) {
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final String from = "*******@gmail.com";
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// Google account mail address
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final String username = "*******@gmail.com";
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// Google App password
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final String password = "*******";
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final String charset = "UTF-8";
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final String encoding = "base64";
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// for gmail
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String host = "smtp.gmail.com";
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String port = "587";
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String starttls = "true";
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Properties props = new Properties();
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props.put("mail.smtp.host", host);
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props.put("mail.smtp.port", port);
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props.put("mail.smtp.auth", "true");
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props.put("mail.smtp.starttls.enable", starttls);
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props.put("mail.smtp.connectiontimeout", "10000");
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props.put("mail.smtp.timeout", "10000");
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props.put("mail.debug", "true");
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Session session = Session.getInstance(props,
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new javax.mail.Authenticator() {
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protected PasswordAuthentication getPasswordAuthentication() {
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return new PasswordAuthentication(username, password);
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}
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});
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try {
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MimeMessage message = new MimeMessage(session);
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message.setHeader("Content-Transfer-Encoding", encoding);
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message.setSubject(subject, charset);
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// Set From:
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message.setFrom(new InternetAddress(from));
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// Set ReplyTo:
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message.setReplyTo(new Address[]{new InternetAddress(from)});
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// Set To:
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message.setRecipient(Message.RecipientType.TO, new InternetAddress(to));
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message.setContent(content, "text/html; charset=" + charset);
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Transport.send(message);
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} catch (MessagingException e) {
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throw new RuntimeException(e);
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} catch (UnsupportedEncodingException e) {
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throw new RuntimeException(e);
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}
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}
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```
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以下はJavaMailのデバッグ用のログです。
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```
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DEBUG: JavaMail version 1.6.1
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DEBUG: successfully loaded resource: /META-INF/javamail.default.providers
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DEBUG: Tables of loaded providers
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DEBUG: Providers Listed By Class Name: {com.sun.mail.smtp.SMTPSSLTransport=javax.mail.Provider[TRANSPORT,smtps,com.sun.mail.smtp.SMTPSSLTransport,Oracle], com.sun.mail.smtp.SMTPTransport=javax.mail.Provider[TRANSPORT,smtp,com.sun.mail.smtp.SMTPTransport,Oracle], com.sun.mail.imap.IMAPSSLStore=javax.mail.Provider[STORE,imaps,com.sun.mail.imap.IMAPSSLStore,Oracle], com.sun.mail.pop3.POP3SSLStore=javax.mail.Provider[STORE,pop3s,com.sun.mail.pop3.POP3SSLStore,Oracle], com.sun.mail.imap.IMAPStore=javax.mail.Provider[STORE,imap,com.sun.mail.imap.IMAPStore,Oracle], com.sun.mail.pop3.POP3Store=javax.mail.Provider[STORE,pop3,com.sun.mail.pop3.POP3Store,Oracle]}
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DEBUG: Providers Listed By Protocol: {imaps=javax.mail.Provider[STORE,imaps,com.sun.mail.imap.IMAPSSLStore,Oracle], imap=javax.mail.Provider[STORE,imap,com.sun.mail.imap.IMAPStore,Oracle], smtps=javax.mail.Provider[TRANSPORT,smtps,com.sun.mail.smtp.SMTPSSLTransport,Oracle], pop3=javax.mail.Provider[STORE,pop3,com.sun.mail.pop3.POP3Store,Oracle], pop3s=javax.mail.Provider[STORE,pop3s,com.sun.mail.pop3.POP3SSLStore,Oracle], smtp=javax.mail.Provider[TRANSPORT,smtp,com.sun.mail.smtp.SMTPTransport,Oracle]}
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DEBUG: successfully loaded resource: /META-INF/javamail.default.address.map
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Thu Aug 02 01:54:33 JST 2018 WARN: Establishing SSL connection without server's identity verification is not recommended. According to MySQL 5.5.45+, 5.6.26+ and 5.7.6+ requirements SSL connection must be established by default if explicit option isn't set. For compliance with existing applications not using SSL the verifyServerCertificate property is set to 'false'. You need either to explicitly disable SSL by setting useSSL=false, or set useSSL=true and provide truststore for server certificate verification.
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DEBUG: getProvider() returning javax.mail.Provider[TRANSPORT,smtp,com.sun.mail.smtp.SMTPTransport,Oracle]
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DEBUG SMTP: need username and password for authentication
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DEBUG SMTP: protocolConnect returning false, host=smtp.gmail.com, user=******, password=<null>
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DEBUG SMTP: useEhlo true, useAuth true
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DEBUG SMTP: trying to connect to host "smtp.gmail.com", port 587, isSSL false
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220 smtp.gmail.com ESMTP e21-v6sm39546145pfl.187 - gsmtp
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DEBUG SMTP: connected to host "smtp.gmail.com", port: 587
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EHLO 192.168.3.4
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250-smtp.gmail.com at your service, [60.94.102.161]
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250-SIZE 35882577
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250-8BITMIME
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250-STARTTLS
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250-ENHANCEDSTATUSCODES
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250-PIPELINING
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250-CHUNKING
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250 SMTPUTF8
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DEBUG SMTP: Found extension "SIZE", arg "35882577"
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DEBUG SMTP: Found extension "8BITMIME", arg ""
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DEBUG SMTP: Found extension "STARTTLS", arg ""
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DEBUG SMTP: Found extension "ENHANCEDSTATUSCODES", arg ""
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DEBUG SMTP: Found extension "PIPELINING", arg ""
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DEBUG SMTP: Found extension "CHUNKING", arg ""
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DEBUG SMTP: Found extension "SMTPUTF8", arg ""
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STARTTLS
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220 2.0.0 Ready to start TLS
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EHLO 192.168.3.4
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250-smtp.gmail.com at your service, [60.94.102.161]
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250-SIZE 35882577
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250-8BITMIME
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250-AUTH LOGIN PLAIN XOAUTH2 PLAIN-CLIENTTOKEN OAUTHBEARER XOAUTH
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250-ENHANCEDSTATUSCODES
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250-PIPELINING
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250-CHUNKING
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250 SMTPUTF8
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DEBUG SMTP: Found extension "SIZE", arg "35882577"
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DEBUG SMTP: Found extension "8BITMIME", arg ""
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DEBUG SMTP: Found extension "AUTH", arg "LOGIN PLAIN XOAUTH2 PLAIN-CLIENTTOKEN OAUTHBEARER XOAUTH"
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DEBUG SMTP: Found extension "ENHANCEDSTATUSCODES", arg ""
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DEBUG SMTP: Found extension "PIPELINING", arg ""
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DEBUG SMTP: Found extension "CHUNKING", arg ""
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DEBUG SMTP: Found extension "SMTPUTF8", arg ""
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DEBUG SMTP: protocolConnect login, host=smtp.gmail.com, user=********@gmail.com, password=<non-null>
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DEBUG SMTP: Attempt to authenticate using mechanisms: LOGIN PLAIN DIGEST-MD5 NTLM XOAUTH2
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DEBUG SMTP: Using mechanism LOGIN
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DEBUG SMTP: AUTH LOGIN command trace suppressed
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DEBUG SMTP: AUTH LOGIN succeeded
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DEBUG SMTP: use8bit false
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MAIL FROM:<********@gmail.com>
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250 2.1.0 OK e21-v6sm39546145pfl.187 - gsmtp
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RCPT TO:<********@gmail.com>
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250 2.1.5 OK e21-v6sm39546145pfl.187 - gsmtp
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DEBUG SMTP: Verified Addresses
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DEBUG SMTP: ********@gmail.com
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DATA
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354 Go ahead e21-v6sm39546145pfl.187 - gsmtp
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Date: Thu, 2 Aug 2018 01:54:33 +0900 (JST)
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145
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+
From: =?UTF-8?B?44K544Kx44K444Ol44O844Or566h55CG44K344K544OG44Og?=
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+
<********@gmail.com>
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Reply-To: ********@gmail.com
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To: ********@gmail.com
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Message-ID: <423016959.1.1533142473874@[192.168.3.4]>
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+
Subject: =?UTF-8?B?W+WGjemAgV0g5Lya6K2w44Gu6ZaL5YKs5pel56iL44Gr?=
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+
=?UTF-8?B?44Gk44GE44GmKOimgeaxguiAhe+8muWkqueUsOaCoOS7iyk=?=
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+
MIME-Version: 1.0
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153
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+
Content-Type: text/html; charset=UTF-8
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154
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+
Content-Transfer-Encoding: base64
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155
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+
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156
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+
PGh0bWw+PGJvZHk+4oC744GT44Gu44Oh44O844Or44Gv44CB44G+44Gg5YWl5Yqb44GV44KM44Gm
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157
|
+
44GE44Gq44GE5pa544Gr6YCB5L+h44GX44Gm44GE44G+44GZ44CCPGJyPjxicj4g5aSq55Sw5oKg
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158
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+
5LuL44GV44KT44GL44KJ5YWl5Yqb6KaB5rGC44GM5bGK44GE44Gm44GE44G+44GZ44CCPGJyPjxi
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|
159
|
+
cj48aHIgYWxpZ249ImxlZnQiIHdpZHRoPSI1NSUiPjxicj7kvJrorbDjgpLjgZfjgb7jgZnjgII8
|
|
160
|
+
YnI+PGhyIGFsaWduPSJsZWZ0IiB3aWR0aD0iNTUlIj48YnI+6L+U562U44Gv5Lul5LiL44GuVVJM
|
|
161
|
+
44GL44KJ44CBMjAxOC0wOC0yMOOBvuOBp+OBq+OBiumhmOOBhOOBl+OBvuOBmeOAgjxicj48YSBo
|
|
162
|
+
cmVmPSJodHRwOi8vbG9jYWxob3N0OjgwODAvU2NoZWR1bGVNYW5hZ2VyL0Fuc3dlclBhZ2UvMHJr
|
|
163
|
+
NVBuRklqTCI+6L+U562U44Oa44O844K4PC9hPjxicj48YnI+PC9ib2R5PjwvaHRtbD4=
|
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164
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+
.
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165
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+
250 2.0.0 OK 1533142477 e21-v6sm39546145pfl.187 - gsmtp
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166
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+
DEBUG SMTP: message successfully delivered to mail server
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167
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+
QUIT
|
|
168
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+
221 2.0.0 closing connection e21-v6sm39546145pfl.187 - gsmtp
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169
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+
```
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