Applicable to:
- Plesk for Linux
Symptoms
-
Mail forwarding or mailing form on a website hosted in Plesk does not work.
-
The following error message can be found in
/var/log/maillog:CONFIG_TEXT: sendmail[16679]: my_popen(): execve(/usr/lib/plesk-9.0/sendmail/sendmail.postfix) failed: Permission denied [13] sendmail[16679]: Unable to execute MTA
CONFIG_TEXT: plesk sendmail[2118]: Unable to save stdin content to temporary file
plesk sendmail[2120]: cannot create temporary file - (13) Permission denied -
The permissions for
sendmail.postfixorpostfix-sendmail-wrapperfiles are set as follows:-
on CentOS/RHEL-based distributions:
# stat /usr/lib64/plesk-9.0/sendmail/sendmail.postfix
Access: (0750/-rwxr-x---) Uid: ( 0/ root) Gid: ( 0/ root)# stat /usr/lib64/plesk-9.0/postfix-sendmail-wrapper
Access: (4750/-rwsr-x---) Uid: ( 0/ root) Gid: ( 0/ root) -
on Debian/Ubuntu-based distributions
# stat /usr/lib/plesk-9.0/sendmail/sendmail.postfix
Access: (0750/-rwxr-x---) Uid: ( 0/ root) Gid: ( 1010/postdrop)# stat /usr/lib/plesk-9.0/postfix-sendmail-wrapper
Access: (4750/-rwsr-x---) Uid: ( 0/ root) Gid: ( 1010/postdrop)
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Cause
Incorrect permissions or ownership on the Sendmail binary files.
Resolution
-
Connect to the server via SSH.
-
Set the correct permissions:
-
on CentOS/RHEL-based distributions
# chown root:root /usr/lib64/plesk-9.0/sendmail/sendmail.postfix && chmod 755 /usr/lib64/plesk-9.0/sendmail/sendmail.postfix
# chown root:root /usr/lib64/plesk-9.0/postfix-sendmail-wrapper && chmod 4755 /usr/lib64/plesk-9.0/postfix-sendmail-wrapper -
on Debian/Ubuntu-based distributions
# chown root:root /usr/lib/plesk-9.0/sendmail/sendmail.postfix && chmod 755 /usr/lib/plesk-9.0/sendmail/sendmail.postfix
# chown root:root /usr/lib/plesk-9.0/postfix-sendmail-wrapper && chmod 4755 /usr/lib/plesk-9.0/postfix-sendmail-wrapper
Comments
2 comments
We have a few servers, on which the permissions of these files get changed regularly.
What kind of process may be responsible for this behaviour and is there a way to have plesk fix this permanently?
Leonid Gukhman on Ubuntu 20.04 the permissions are set as follows (by default):
File: /usr/lib/plesk-9.0/sendmail/sendmail.postfix
Access: (0755/-rwxr-xr-x) Uid: ( 0/ root) Gid: ( 0/ root)
File: /usr/lib/plesk-9.0/postfix-sendmail-wrapper
Access: (4755/-rwsr-xr-x) Uid: ( 0/ root) Gid: ( 0/ root)
However, when trying to send mails from command line, we still get
plesk sendmail[2120]: cannot create temporary file - (13) Permission denied
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