メール送信時に何か問題があり、宛先に届けられなかった場合、メール送信後にエラーメールが返ってくることがあります。このエラーメールには、エラ−になった原因を特定する重要な内容が記載されています。
以下のエラーメールの例をご参照の上、対処を行ってください。
※お客様がご利用のメールアドレスにより、エラーメールの記載内容が若干異なる場合があります。
※発信元や題名をエラーメールのように装って、送られてくる迷惑メールもありますのでご注意ください。

Q1
Q2
Q3
Q4
Q5
Q6
Q7
Q8
Q9
Q10

エラーメッセージ：

550 Invalid recipient:sample@xxxxxx.com
550 <sample@xxxxxx.com>... User unknown
550 5.7.1 Mail Refused - 210.xx.xx ? See
http://security.rr.com/mail_blocks.htm#security - 20031121

A2

エラーメッセージ：

This Message was undeliverable due to the following reason: Your message was not delivered because the destination computer wasnot found. Carefully check that it was spelled correctly and trysending it again if there were any mistakes.

It is also possible that a network problem caused this situation,so if you are sure the address is correct you might want to try tosend it again. If the problem continues, contact your friendlysystem administrator.
Host d4.dion.ne.jp not found
The following recipients did not receive this message:
sample@xxxxxx.com

A3

エラーメッセージ：

This Message was undeliverable due to the following reason:
The user(s) account is temporarily over quota.
<sample@xxxxxx.com>

A4

エラーメッセージ：

The original message was received at Sun, 21 Dec 2003 16:16:22 +0900 (JST)
from [10.55.xx.xx]
----- The following addresses had permanent fatal errors -----
<sample@xxxxxx.com>
(reason: 552 <sample@xxxxxx.com>... Message size exceeds fixed maximum message size (5242880))

----- Transcript of session follows -----
... while talking to ispmail0:
>>> MAIL From:<sample@xxxxxx.com> SIZE=17320641
<<< 552 <sample@xxxxxx.com>... Message size exceeds fixed maximum message size (5242880)
554 5.0.0 Service unavailable

A5

メッセージ：

**********************************************
** THIS IS A WARNING MESSAGE ONLY **
** YOU DO NOT NEED TO RESEND YOUR MESSAGE ** **********************************************

The original message was received at Wed, 19 Nov 2003 17:06:34 +0900 (JST)
from ispmail0.dion.ne.jp [210.141.xx.xx]

----- The following addresses had transient non-fatal errors -----
sample2@xxxxxx.co.jp
(expanded from: <sample@xxxxxx.com>)

----- Transcript of session follows -----
sample2@xxxxxx.co.jp... Deferred: Connection refused by lsean.ezweb.ne.jp.Warning: message still undelivered after 1 hourWill keep trying until message is * day old

メールの送信に対して、一定時間以上の遅延が発生している旨を、送信者に対してお知らせをしたもので、エラーメールではありません。
メッセージは受信先サーバが受け取るまで、数回再送を続けます。再送しても「Your message was not delivered within * days」というエラーが返ってくる可能性があります。

一日待っていただき、下記（Q6）のエラーメールが来た場合は、再度送信をお試しください。

A6

エラーメッセージ：

This Message was undeliverable due to the following reason:

Your message was not delivered because the destination computer wasnot reachable within the allowed queue period. The amount of timea message is queued before it is returned depends on local configura-tion parameters.

Most likely there is a network problem that prevented delivery, butit is also possible that the computer is turned off, or does nothave a mail system running right now.

Your message was not delivered within 1 days.
Host ezweb.ne.jp is not responding.

The following recipients did not receive this message:
sample2@xxxxxx.co.jp

A7

エラーメッセージ：

The original message was received at Sat, 22 Mar 2003 10:28:54 +0900(JST) from B139072.ppp.dion.ne.jp [210.230.139.72]

----- The following addresses had permanent fatal errors -----
sample@xxxxxx.com

----- Transcript of session follows -----
... while talking to mail01.mot.ne.jp.:
>>> MAIL From:<sample@xxxxxx.com> SIZE=15514
<<< 501 5.5.4 Invalid Address
501 <sample@xxxxxx.com>... Data format error

A8

エラーメッセージ：

553 5.3.0 Spam blocked see:
See http://security.rr.com/mail_blocks.htm#security

553 5.1.8 <sample@xxxxxx.com>... Domain of sender address sample3@xxxxxx.ne.jp does not exist

A9

エラーメッセージ：

**********************************************
** THIS IS A WARNING MESSAGE ONLY**
** YOU DO NOT NEED TO RESEND YOUR MESSAGE**
**********************************************

----- The following addresses had transient non-fatal errors -----
( 〜宛先〜 )

----- Transcript of session follows -----
451 ( 〜宛先〜 )... (宛先ドメイン) : Name server timeout
Warning: message still undelivered after 4 hours
Will keep trying until message is 5 days old

A10

エラーメッセージ：

**********************************************
** THIS IS A WARNING MESSAGE ONLY**
** YOU DO NOT NEED TO RESEND YOUR MESSAGE**
**********************************************

The original message was received at 〜 日付 〜 +0900(JST)
from 〜

----- The following addresses had permanent fatal errors -----
<〜宛先〜>

----- Transcript of session follows -----
552 <〜宛先〜>... Message is too large; 1000000 bytes max
554 <〜宛先〜> ... Service unavailable