can't sending email

[HamadaBader]

there are problem for sending email

/script/sysinfo

A. Kloxo-MR: 6.5.0.f-2016081702

B. OS: CentOS release 6.8 (Final) x86_64

C. Apps:
   1. MySQL: mysql55-5.5.51-1.ius.el6.x86_64
   2. PHP: php53u-5.3.29-1.ius.el6.x86_64
   3. Httpd: httpd-2.2.31-1.mr.el6.x86_64
   4. Lighttpd: --uninstalled--
   5. Nginx: --uninstalled--
   6. Qmail: qmail-toaster-1.03-1.3.55.mr.el6.x86_64
      - with: courier-imap-toaster-4.1.2-1.3.20.mr.el6.x86_64
   7. Dns: bind-9.9.7-1.mr.el6.x86_64

D. Php-type (for Httpd/proxy): mod_php_ruid2

E. Memory:
                total       used       free     shared    buffers     cached
   Mem:          5851        536       5314          1         12        161
   -/+ buffers/cache:        362       5488
   Swap:            0          0          0

and also run
/script/fixmail-all
/script/fixmail

and not solve and i also get 500 internal server error
if i use contact us page in my site

any help please

[MRatWork]

Inform here 'hostname; hostname -s' from ssh.

[HamadaBader]

thanks for reply

http://i.imgur.com/3U5dl70.png

[MRatWork]

Make sure 'server.uploadserv.tk' can reach from outside (like 'ping server.uploadserv.tk').

In your situation, add 'A record' for 'server' under 'uploadserv.tk' dns settings.

[MRatWork]

Check your mail issues in http://mxtoolbox.com/domain/uploadserv.tk/

[HamadaBader]

DNS Templates
http://i.imgur.com/tn51p02.png

how to ,, if more explain
like 'ping server.uploadserv.tk

and in add a
http://i.imgur.com/HKVJqaO.png
i set server for Hostname what about Value ?? is the ip or what?

if more explain please for any mail issues i not have experience please ,,

[MRatWork]

Value is IP like IP for '__base__' (primary public IP).

[HamadaBader]

it set it and still problem
http://i.imgur.com/3Id7o8P.png

and when open server.uploadserv.tk get Server not found
http://i.imgur.com/RYpDLiO.png

the pinging for uploadserv.tk work http://i.imgur.com/RMY9sbj.png
not server.uploadserv.tk

more explain please for mail issues
http://mxtoolbox.com/domain/uploadserv.tk/

also get http://i.imgur.com/WMXuw5A.png

[MRatWork]

1. You can't reach server.uploadserv.tk from web browser because this subdomain can't assign to webserver. It's normal but make sure no issue from 'ping server.uploadserv.tk'
2. Click 'email auth' to enable spf for every domains. Dmarc only exists in Kloxo-MR 7.0
3. Set 'server.uploadserv.tk' instead 'mail.uploadserv.tk' in 'my name (domain name)' in 'server mail settings'.

[HamadaBader]

there is no ping for server.uploadserv.tk ,  window closed after run directly
please you can try

i set email auth http://i.imgur.com/cSHOICG.png

also set server mail settings http://i.imgur.com/NLSRli4.png

and still

[MRatWork]

Run 'ping server.uploadserv.tk' from ssh or from windows's commands prompt.

[MRatWork]

Make sure all settings alright with execute 'sh /script/fix-all; sh /script/restart-all'.

[HamadaBader]

Done from ssh http://i.imgur.com/sClR4ZQ.png

and run sh /script/fix-all; sh /script/restart-all

and still problem ,, test send from webmail and from contact us page also