PHP Sendmail out, but users cannot receive any mail.

[iflove]

Dear Sir,

My forum is using php sendmail, but users cannot receive any mail. A test shows that a mail has been sent out, but I cannot received this test mail.

Using PHP Sendmail

Centos 6 X86 64 Minimal fresh install Kloxo mr 7.0

Could you please help me fix this? Thank you.

[MRatWork]

Read https://forum.mratwork.com/kloxo-mr-tips-and-tricks/(tip)-how-to-setup-qmail-on-kloxo-mr/ (especially for 'NOTE: - for to make sure, receipent...').

[MRatWork]

Also check 'maillog' in 'log manager'.