bash 使用 sendmail 强制内容类型
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Force Content Type with sendmail
提问by Labynocle
I got a little problem when sending mail with sendmail: each mail are sent with Content-Type: multipart/alternativebut I wonder to send my mail only in Content-Type: text/plain. The reason is because of GMAIL web interface respect the RFC, my message is displayed with the latest Content-typebut because my message is not in HTML, the display is awful.
从sendmail发送邮件时我有一个小问题：每封邮件与发送Content-Type: multipart/alternative，但我不知道送我的邮箱只是在Content-Type: text/plain。原因是因为 GMAIL 网络界面尊重 RFC，我的消息显示为最新Content-type但因为我的消息不是 HTML，所以显示很糟糕。
My bash script is as following:
我的 bash 脚本如下：
#!/bin/bash
SENDMAIL_BIN='/usr/sbin/sendmail'
FROM_MAIL_ADDRESS='[email protected]'
FROM_MAIL_DISLAY='Test format mail'
RECIPIENT_ADDRESSES='[email protected]'
MAIL_CMD="$SENDMAIL_BIN -f $FROM_MAIL_ADDRESS -F \"$FROM_MAIL_DISLAY\" $RECIPIENT_ADDRESSES"
(echo "Subject: Test format";echo -e "MIME-Version: 1.0\nContent-Type: text/plain;\n\n" && cat output.txt) | eval $MAIL_CMD
But my script doesn't seem to rewrite the Content-Typeand it's still Content-type: multipart/alternative(according to the show originalof my mail).
但是我的脚本似乎没有重写Content-Type，它仍然是Content-type: multipart/alternative（根据我邮件的显示原件）。
nota:
注意：
- There is nothing special in my output.txt (only log lines from my app).
- I tried a gruik hack: put a
<pre>and</pre>but the display is still awful with<pre>in the source of the mail in theContent-Type: text/htmlpart...
- 我的 output.txt 没有什么特别之处（只有我的应用程序中的日志行）。
- 我尝试了一个 gruik hack：放一个
<pre>and</pre>但<pre>在Content-Type: text/html部分邮件的来源中显示仍然很糟糕......
If you have any clue or if you know how to change the order of the Content-Typewith sendmail let me know.
如果您有任何线索，或者您知道如何更改Content-Typewith sendmail的顺序，请告诉我。
Thanks in advance
提前致谢
回答by Labynocle
I have a non solution, instead of to force my mail to be in text/plain, I will send a mail in text/htmlbut I will add the <pre>tag to open and close my output file... And because it's now in text/html, the <pre>tag is not displayed as <pre>
我有一个非解决方案，而不是强制我的邮件进入text/plain，我将发送一封邮件，text/html但我将添加<pre>标签以打开和关闭我的输出文件......而且因为它现在在text/html，<pre>标签不会显示为<pre>
It's not what I excepted but it works. So my previous script simply become:
这不是我所排除的，但它有效。所以我之前的脚本简单地变成了：
#!/bin/bash
SENDMAIL_BIN='/usr/sbin/sendmail'
FROM_MAIL_ADDRESS='[email protected]'
FROM_MAIL_DISLAY='Test format mail'
RECIPIENT_ADDRESSES='[email protected]'
MAIL_CMD="$SENDMAIL_BIN -f $FROM_MAIL_ADDRESS -F \"$FROM_MAIL_DISLAY\" $RECIPIENT_ADDRESSES"
(echo "Subject: Test format";echo -e "MIME-Version: 1.0\nContent-Type: text/html;\n" && echo '<pre>' && cat output.txt && echo '</pre>') | eval $MAIL_CMD
回答by konsolebox
Try removing the extra semicolon on the content type:
尝试删除内容类型上的额外分号：
echo -e "MIME-Version: 1.0\nContent-Type: text/plain\n\n"
echo -e "MIME-Version: 1.0\nContent-Type: text/plain\n\n"
Also it's better to use arrays than parse a string with eval:
此外，使用数组比使用 eval 解析字符串更好：
#!/bin/bash
SENDMAIL_BIN='/usr/sbin/sendmail'
FROM_MAIL_ADDRESS='[email protected]'
FROM_MAIL_DISLAY='Test format mail'
RECIPIENT_ADDRESSES='[email protected]'
MAIL_CMD=("$SENDMAIL_BIN" -f "$FROM_MAIL_ADDRESS" -F "$FROM_MAIL_DISLAY" "$RECIPIENT_ADDRESSES")
(echo "Subject: Test format";echo -e "MIME-Version: 1.0\nContent-Type: text/plain\n\n" && cat output.txt) | "${MAIL_CMD[@]}"
