check your php.ini file also what program you are using maybe a bug or a little adjustment in a config file
Yes, I've already tested it. My php.ini and phpinfo() shows me that:
sendmail_from = me@localhost.com
SMTP = localhost
smtp_port = 25
sendmail_path = /usr/sbin/sendmail -t -i
I haven't changet it but I have tried to change those values. I put back like it was.
Any suggestions?