■簡易メルマガ配信処理にて、エラーメールがきた場合 
    以下の文面のような内容のメールが送られます。
    1. 【メールサーバ側の問題の場合】
      
      
            This is the Postfix program at host mx.example.jp
      
      
      
            I'm sorry to have to inform you that the message returned
      
            below could not be delivered to one or more destinations.
      
      
      
            For further assistance, please send mail to <postmaster>
      
      
      
            If you do so, please include this problem report. You can
      
            delete your own text from the message returned below.
      
      
      
                   The Postfix program
      
      
      
            <aaa@bbb.co.jp>: connect to mx.example.jp[999.999.999.999]: No route to host
      
      	    
      相手先のメール配送サービスが機能していません。

    2. 【メールアドレスに誤りがある場合】
      例1: メールサーバにメールアカウントが存在しない
      
            I'm sorry to have to inform you that the message returned
      
            below could not be delivered to one or more destinations.
      
      
      
            For further assistance, please send mail to <postmaster>
      
      
      
            If you do so, please include this problem report. You can
      
            delete your own text from the message returned below.
      
      
      
                   The Postfix program
      
      
      
            <no_user@example.com>: host mx.example.com[333.333.333.333] said: 550 5.1.1
      
                <no_user@example.com>... User unknown (in reply to RCPT TO command)
      
            Reporting-MTA: dns; mx1.srve.net
      
            Arrival-Date: Sat, 16 Apr 2005 15:32:09 +0900 (JST)
      
      
      
            Final-Recipient: rfc822; no_user@example.com
      
            Action: failed
      
            Status: 5.0.0
      
            Diagnostic-Code: X-Postfix; host mx.example.com[333.333.333.333] said: 550 5.1.1
      
            <no_user@example.com>... User unknown (in reply to RCPT TO command)
      
      	    
      例2: 【メールサーバが存在しない】
      
            I'm sorry to have to inform you that the message returned
      
            below could not be delivered to one or more destinations.
      
      
      
            For further assistance, please send mail to <postmaster>
      
      
      
            If you do so, please include this problem report. You can
      
            delete your own text from the message returned below.
      
      
      
                             The Postfix program
      
      
      
            <aaa@bad.host.com>: Name service error for name=bad.host.com type=A: Host not found
      
            Reporting-MTA: dns; mx1.srve.net
      
            Arrival-Date: Tue, 19 Apr 2005 09:40:27 +0900 (JST)
      
      
      
            Final-Recipient: rfc822; aaa@bad.host.com
      
            Action: failed
      
            Status: 5.0.0
      
            Diagnostic-Code: X-Postfix; Name service error for name=l.jp type=A: Host not
      
            found
      
      	    

    3. 【送り先のメールボックスが一杯の場合】
      
      
            The original message was received at Sat, 20 Nov 2004 08:27:37 +0900 (JST)
      
            from mx.example.jp [111.111.111.111]
      
            
      
            ----- The following addresses had permanent fatal errors -----
      
            <full_user@example.jp>
      
      
      
            ----- Transcript of session follows -----
      
            ... while talking to local:
      
            DATA
      
            <<< 552 5.2.2 The recipient's mailbox is full.
      
            554 <full_user@example.jp>... Service unavailable
      
            Reporting-MTA: dns; dns.example.jp
      
            Received-From-MTA: DNS; mx.example.jp
      
            Arrival-Date: Sat, 20 Nov 2004 08:27:37 +0900 (JST)
      
      
      
            Final-Recipient: RFC822; <full_user@example.jp>
      
            Action: failed
      
            Status: 5.2.2
      
            Remote-MTA: DNS; local
      
            Diagnostic-Code: X-Unix; 552 5.2.2 The recipient's mailbox is full.
      
            Last-Attempt-Date: Sat, 20 Nov 2004 08:27:37 +0900 (JST)
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