==== Required information ====
- iRedMail version (check /etc/iredmail-release):
- Linux/BSD distribution name and version:
- Store mail accounts in which backend (LDAP/MySQL/PGSQL):
- Web server (Apache or Nginx):
- Manage mail accounts with iRedAdmin-Pro?
- [IMPORTANT] Related original log or error message is required if you're experiencing an issue.
====- iRedMail version (check /etc/iredmail-release):  0.9.7
- Linux/BSD distribution name and version: Ubuntu 14.04.5 LTS
- Store mail accounts in which backend (LDAP/MySQL/PGSQL): MySQL
- Web server (Apache or Nginx):Apache
- Manage mail accounts with iRedAdmin-Pro? No

Hello

I'm trying to send  a mass mailer and my phpmailer hangs once every 30 messages.
And once I restart phpmailer it sends the next 30 messages and then hangs
No error messages in apache log or mail log.

I'm sending the messages at 1 message per 2 seconds.

Is there any setting which I have to change.

My throttle mysql table is empty and I have commented

2 lines in /etc/postfix/main.cf

# Recipient restrictions
smtpd_recipient_restrictions =
    reject_unknown_recipient_domain
    reject_non_fqdn_recipient
    reject_unlisted_recipient
   #check_policy_service inet:127.0.0.1:7777
    permit_mynetworks
    permit_sasl_authenticated
    reject_unauth_destination

# END-OF-MESSAGE restrictions
smtpd_end_of_data_restrictions =
    #check_policy_service inet:127.0.0.1:7777