PHP sendmail don't work, svripts can't send mails

hello

some of my clients said me that they couldnt send mail via php functions. in their forum scirpts or like this mail();

do you have any advises about it? which seting did i make wrong?

WHM -> Tweak Settings

Add the mail. prefix for mailman urls (ie http://mail.domain.com/mailman) Checked

Attempt to prevent pop3 connection floods Checked

BoxTrapper Spam Trap Checked

localuser blackhole fail Default catch-all/default address behavior for new accounts. fail will generally save the most CPU time. fail

Email users when they have reached 80% of their bandwidth Checked

Horde Webmail Checked

Include a list of Pop before SMTP senders in the X-PopBeforeSMTP header when relaying mail. (exim 4.34-30+ required) unchecked

Mailman Checked

Neomail Webmail Checked

Number of minutes between mail server queue runs (default is 60).: 180


Prevent the user 'nobody' from sending out mail to remote addresses (php and cgi scripts generally run as nobody if you are not using phpsuexec and suexec respectively.) unchecked


Silently Discard all FormMail-clone requests with a bcc: header in the subject line unChecked

SpamAssassin Checked

SpamAssassin Spam Box delivery for messages marked as spam (user configurable) Checked

SquirrelMail Webmail Checked

The maximum each domain can send out per hour (0 is unlimited): 1000

The number of times users are allowed to check their mail using pop3 per hour: 0

Track the origin of messages sent though the mail server by adding the X-Source headers (exim 4.34+ required) Checked
do you know which one is wrong or any ideas?

Thanks

 

 

 

 

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