Hello, I have single mail server that send relatively large amounts of emails at least 3 times a day ranging from 15K to 50K each time ..
80% of emails are going to one domain owned by my company *(Domain1)*.. The current mail flow does around 1K-1.2K per minute , this is CentOS 7 VM ( 4 CPU/8GB Memory) running on SSD Datastore. Upon digging into logs, I found lots of postfix/anvil statistics DNS lookup misses for *(Domain1)* , I made some changes which produced small improvements (AVG/Minute went from 1K ~ 1.2K).. Any guidance is appreciated Thanks Jim *The changes below produced small improvements * - Created static transport for internal domain to forward email to local "VIP" ,VIP RR to 8 servers behind , the 8 servers are the MX host for the company owned domain. - Changed default_destination_concurrency_limit to 100 and default_destination_recipient_limit = 1500
