[cPanel] Function mail(); and fowarders e-mail - not working

[KamilPRO]

Hello

I have problem:
1. Function mail(); not working

2. osCommerce e-mail error:

Gid 32157 is not permitted to relay mail, or has directly called /usr/sbin/exim instead of /usr/sbin/sendmail.

3. Fowarders working only on internal accounts e-mail
fowarder@mydomain.com --> email@mydomain.com - working
fowarder@mydomain.com --> my-emiail123@mail.pl - not working

This is VPS cPanel (OpenVZ) on my dedicated server.

[KamilPRO]

help m

[KamilPRO]

Now working,

I uncheck: Track the origin of messages sent though the mail server by adding the X-Source headers (exim 4.34+ required)

Is this safe ?