sendmail mailq 以 'X' 结尾的文件名是什么？

Question

我有一个 mqueue，里面装满了以 X 结尾的文件，但我不明白为什么它们有 'X'，'X' 意味着什么，以及为什么 sendmail 不处理它们（谷歌搜索添加 'X' 似乎太模糊了:)

例如

                /var/spool/mqueue (70 requests)
-----Q-ID----- --Size-- -----Q-Time----- ------------Sender/Recipient-----------
t9QM56ql012231X   99091 Tue Oct 27 09:05 <...

t9R7dTje012912X   97292 Tue Oct 27 18:39 <...
.
.

样本qft9QM56ql012231开始：

V8
T1445897106
K0
N0
P129683
Fbs
$_[192.168.0.46]
$rESMTP
$suserPC
${daemon_flags}
${if_addr}192.168.0.240
S<...
rRFC822; ...
RPFD:<...
H?P?Return-Path: <�g>

（当然，我已将所有电子邮件地址替换为“...”）

Answer 1

man mailq

DESCRIPTION
Mailq prints a summary of the mail messages queued for future delivery.

The first line printed for each message shows the internal identifier used on this host for the message with a possible status character, the size of the message in bytes, the date and time the message was accepted into the queue, and the envelope sender of the message. The second line shows the error message that caused this message to be retained in the queue; it will not be present if the message is being processed for the first time. The status characters are either * to indicate the job is being processed; X to indicate that the load is too high to process the job; and - to indicate that the job is too young to process. The following lines show message recipients, one per line.

您可以使用uptime来获取系统的平均负载。

sendmail mailq 以 'X' 结尾的文件名是什么？

sendmail mailq what is a filename that ends in 'X'?

sendmail

mail-queue