I normally sends mass no. of emails via script twice per day (around 40000 emails) each email contains one recipient. And my script will sleep for 5 seconds after every 1000 emails. I noticed many exim processes running when script exeuctes and around 20-30% emails stucks in queue and server load is quite high during mass mailing. What are the specific parameters to optimize outgoing mass emails ? Is there any way to throttle outgoing emails ?
Furhter, i noticed stuck(queued) emails logs describes. * Recipient address rejected: Greylisted for 2 minutes * 451 Temporary local problem - please try later * R=dkim_lookuphost defer (-1): host lookup did not complete To me it's look likes recipient addresses are not accepting my emails. Probably DNS, RDNS or SPF issue. right or wrong ? and for successfull outgoing emails normally log describes * SMTP Outbound Connection .. what does that means ? -- ## List details at https://lists.exim.org/mailman/listinfo/exim-users ## Exim details at http://www.exim.org/ ## Please use the Wiki with this list - http://wiki.exim.org/
