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Product ConnectXf
Version 3.10
Applies to Administrators
Level Advanced

Mails from External domains are getting delayed


  • Greylisting has been configured on the server
  • The load average on the server is high
  • The SMTP concurrency is touching the maximum and staying at the maximum
  • Top shows a lot of processes for the database connections (postmaster)
  • The postgres database size is large


  • The database response has slowed down, causing the greylist to also respond slowly and the SMTP connections are dropping


  • Tune the kernel (refer to database tuning)
  • Drop the table for the greylist from the postgres database as given in the section on greylisting