Postfix only sends 280 emails
Hi, I have a SMTP only server for may email marketing system, it is not spam, is for well created mail list for some of our customers. Recently it stop sending lists with 1000 recipients and break the process on 280 - 290 recipients I don't know which is wrong with my postfix config as it have been used for one-two months ago without problem.
Please could you give some light to where to look for and fix this issue?
Here is my altered main.cf configs (I listed only what is not default to postfix):
# TUNING default_process_limit = 100 smtp_destination_concurrency_limit = 0 trigger_timeout = 1 qmgr_message_active_limit = 1000000 qmgr_message_recipient_limit = 1000000 hash_queue_names = defer,deferred,incoming,active smtpd_error_sleep_time = 0 # bouces bounce_queue_lifetime = 0 maximal_queue_lifetime = 0 # Errors smtpd_soft_error_limit = 100000