issue with my mail server

Hello ,

i have bought a new dedicated server and i have a prob of emails marked as spam at gmail , yahoo , hotmail ..etc

so i have installed domain keys, spf record and the rDNS for the my IP and make sure everything is okaya but when i come to test it i found that the mail still marked as spam and also i start recevied mails from different ips with this subject :

Postfix SMTP server: errors from mail-px0-f176.google.com[209.85.212.176]

body :

Transcript of session follows.

Out: 220 server1.leapswitch.com ESMTP Postfix
In: EHLO mail-px0-f176.google.com
Out: 250-server1.leapswitch.com
Out: 250-PIPELINING
Out: 250-SIZE 10240000
Out: 250-VRFY
Out: 250-ETRN
Out: 250-AUTH PLAIN LOGIN
Out: 250-AUTH=PLAIN LOGIN
Out: 250-ENHANCEDSTATUSCODES
Out: 250-8BITMIME
Out: 250 DSN
In: MAIL FROM:<link.buildingservice4@gmail.com>
Out: 250 2.1.0 Ok
In: RCPT TO:<webmaster@downloadconvertvideo.com>
Out: 451 4.3.0 Error: queue file write error
In: QUIT
Out: 221 2.0.0 Bye
================================================================

NB : it's my root inbox

so please can anyone help me to fix my issue

thank you so much

 

Looks like an issue with amavisd. Google for the "Error: queue file write error"
It says you must throttle the usage of the daemon

 

so how i can fix it ?

 

look at the suggestions of the search in google. Or for testing purpose, disable one daemon/service at the time and look where the problem lies.
how many messages are you sending at the time?

 

i have contact my Support team about that and they reply with that :

so how i can contact google mail team ?