You ever bang you head against several issues that a simple solution seems too fuzzy to figure out? Well, that’s where I think I am. I’m dealing with a couple of issues like php mail, sendmail, and the sendmail to cssmtp bridge. Thought I take baby steps to figure out what I may be doing wrong.
I’m running zos2.2 and just trying to use sendmail for now. This is the first time I’ve ever played with php. I’ve gotten a helloworld.php program to work. So I grabbed a simple php to mail comments to myself. (of course there is more to it than this line).
mail( $webmaster_email,“Feedback Form Results”,$msg )
but I get this error.
NOQUEUE: SYSERR(userid): EZZ9892I unable to setreuid from 1 to 0: EDC5121I Invalid argument
This is where the fuzzy comes in. I’ve tried so many things to fix the first part, I’m not sure what might work. I believe it’s my configuration but not sure where. The second part I’m not sure about. Any help would be much appreciated.

Hi Jeff,

Could you please provide us the output of the commands:

1. PHP version
   php --version
   and also it would be better to see a number of the build from README.ZOS
2. Is there a path to sendmail?
   which sendmail
3. Is sendmail working for you?
   echo "Subject: sendmail test" | sendmail -v your@mail.com
4. Verify that path to sendmail available for php:
   php -i | grep sendmail
5. If sendmail is not working, probably, suid bit is not set on sendmail binary:
   ls -la /bin/sendmail
   In my case, I have a link:
   lrwxrwxrwx 1 ROOT … /bin/sendmail -> …/usr/lpp/tcpip/bin/sendmail
   so there is need to do this command again:
   ls -la /usr/lpp/tcpip/bin/sendmail
   -rwsr-sr-x 2 SMMSP SMMSPGRP 2252800 Aug 16 2016 /usr/lpp/tcpip/bin/sendmail

These ‘s’ are suid and guid bits that must be set to have user’s and group’s execute permissions.

1 PHP 5.4.4 (cli) (built: Nov 21 2016 03:25:49)
Copyright © 1997-2012 The PHP Group
Zend Engine v2.4.0, Copyright © 1998-2012 Zend Technologies

Build from the VERSION.ZOS file

Tool: php
Version: 5.4.4
Build Number: 0006

find / -name ‘sendmail’

/usr/lpp/tcpip/bin/sendmail
/usr/lpp/tcpip/samples/sendmail
/usr/lpp/tcpip/sbin/sendmail
/usr/sbin/sendmail symbolic link to /usr/lpp/tcpip/sbin/sendmail
/bin/sendmail symbolic link to /usr/lpp/tcpip/bin/sendmail

3. I received the email. (Interesting about the configuration file)

echo “Subject: sendmail test” | sendmail -v your@mail.com

Msmtp: Warning: first argument in [IPC] mailer must be TCP or FILE
Mesmtp: Warning: first argument in [IPC] mailer must be TCP or FILE
Msmtp8: Warning: first argument in [IPC] mailer must be TCP or FILE
Mrelay: Warning: first argument in [IPC] mailer must be TCP or FILE
Warning: .cf file is out of date: sendmail 8.12.1p4 supports version 10, .cf file is version 7
your@mail.com… Connecting to smtp.server via esmtp…
220 mail2.server ESMTP Smtpd; Tue, 15 May 2018 07:37:02 -0700

EHLO test.mainframe
250-mail2.server Hello test.mainframe [xxx.xxx.xxx.xxx], pleased to meet you
250-ENHANCEDSTATUSCODES
250-PIPELINING
250-8BITMIME
250-SIZE 71828480
250-DSN
250-AUTH LOGIN PLAIN
250-STARTTLS
250-DELIVERBY
250 HELP

MAIL From:me@test.mainframe
250 2.1.0 me@test.mainframe… Sender ok

RCPT To:your@mail.com
DATA
250 2.1.5 your@mail.com… Recipient ok
354 Enter mail, end with “.” on a line by itself

.
250 2.0.0 w4FEb29Q022974-w4FEb29R022974 Message accepted for delivery
your@mail.com… Sent (w4FEb29Q022974-w4FEb29R022974 Message accepted for delivery)
Closing connection to smtp.server.

QUIT
221 2.0.0 mail2.server closing connection

php -i | grep sendmail

sendmail_from => no value => no value
sendmail_path => /bin/sendmail -t -i => /bin/sendmail -t -i
Path to sendmail => /bin/sendmail -t -i

ls -la /bin/sendmail

lrwxrwxrwx 1 Root OMVSGRP 29 Mar 23 2016 /bin/sendmail -> …/usr/lpp/tcpip/bin/sendmail

ls -la /usr/lpp/tcpip/bin/sendmail

-rwsr-sr-x 2 Root OMVSGRP 2252800 Jan 10 2017 /usr/lpp/tcpip/bin/sendmail

After seeing the warning of the .cf file for sendmail, I took a closer look at it. In there I fixed my issue, all be it not a perfect fix but at least my php is working.

Hi Jeff,

Actually, php mail() does nothing but call ‘/usr/sbin/sendmail -t -i’ with message headers “To:” and “Subject:” set to the first and the second parameters of mail() respectively. ‘/usr/sbin/sendmail -t -i’ is the default. It can be changed with ‘sendmail_path’ parameter in php.ini configuration file.
http://php.net/manual/en/mail.requirements.php
http://php.net/manual/en/mail.configuration.php