Sendmail succeeds, qmail fails Post: 302900559

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Top Forums UNIX for Advanced & Expert Users Sendmail succeeds, qmail fails Post 302900559 by charles_n_may on Wednesday 7th of May 2014 03:44:59 PM

05-07-2014

Registered User

Sendmail succeeds, qmail fails

I am attempting to send multipart formatted email using sendmail -t with attachments. The attachments always arrive as empty if sent from linux. They are intact if sent from AIX.

Does qmail not support attachments for multipart formatted email?

I have a legacy application which runs splendidly in AIX, generating formatted HTML email and adding mutliple attachments (.csv and .zip files).

This application is being migrated to linux and the sendmail implementation on the linux host is mini-qmail.

Here is a sample file which I can pipe to sendmail -t on either host to demonstrate the problem (If you try to run it, obviously doctor up the To: line so it sends to you).

Please, please don't try an experiment where you just pipe a file through uuencode to sendmail -t and tell me it works. That's not enough. The email has to be multipart, with formatted headers and sections.

Code:

From: Sample sendmail script <samplescript@mydomain.com>
To: myaddress@mydomain.com
Reply-to: DO NOT REPLY <noreply@mydomain.com>
Auto-Submitted: auto-generated
X-Auto-Response-Suppress: all
Subject: Test email with attachment from myhost
Mime-version: 1.0
Content-Type: Multipart/Mixed; boundary="xxxxxq0w9e8r7xxxxx"
--xxxxxq0w9e8r7xxxxx
Content-Type: text/html
<HTML><BODY>
<H1>Here is your formatted data:</H1>
<TABLE border=1>
<tr><th>Column 1</th><th>Column 2</th></tr>
<tr><td>Data 1</td><td>Data 2</td></tr>
</TABLE>
</BODY></HTML>
--xxxxxq0w9e8r7xxxxx
Content-Type: text/plain
Content-Disposition: attachment; filename="testfile.txt"
Content-Transfer-Encoding: uuencode
begin 644 testfile.txt
M=&AI<R!I<R!T:&4@8V]N=&5N="!O9B!T:&4@871T86-H;65N=`IT:&ES(&ES
K('1H92!S96-O;F0@;&EN92!O9B!T:&4@871T86-H;65N="!C;VYT96YT"@``
`
end
--xxxxxq0w9e8r7xxxxx--

Now with the contents above saved in a file named pipe_to_sendmail, execute

Code:

cat pipe_to_sendmail | sendmail -t

The file arrives with an intact attachment that contains two lines of text if sent from AIX.

If sent from linux, the email looks the same, except the attachment arrives as an empty file.

In linux (2.6.32-220.el6.x86_64) the sendmail in my path is a symbolic link to mini-qmail:

Code:

$ which sendmail
/usr/sbin/sendmail
$ ls -l /usr/sbin/sendmail
lrwxrwxrwx 1 root root 28 Jan 16 08:29 /usr/sbin/sendmail -> /var/mini-qmail/bin/sendmail

---------- Post updated at 03:44 PM ---------- Previous update was at 01:08 PM ----------

So my admin installed "real" sendmail to replace qmail and the attachment now arrives intact. Although this works, I don't understand why qmail didn't succeed.

Does this mean qmail itself does not fully support attachments in multipart email? Or is there a difference in the way it is configured that causes its attachments in multipart emails to arrive empty?

charles_n_may

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