I am concerning more specifically for what are the specific parameters to optimize outgoing mass emails in exim.conf ? Is there any way to throttle outgoing emails ?
Thank you. On Tue, Jul 17, 2012 at 8:19 PM, Chris Knadle <[email protected]>wrote: > On Tuesday, July 17, 2012 02:21:43, Muhammad Irfan wrote: > > 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. > > Sort of, and not exactly. > > > Probably DNS, RDNS or SPF issue. right or wrong ? > > I don't think this is RDNS or SPF is related. > > > * Greylisting: > https://en.wikipedia.org/wiki/Greylisting > > > > * "451 Temporary local problem - please try later" is usually the response > when a local configuration error has been reached. So for instance if you > have written an ACL rule that has an error in it and an incoming SMTP > connection reaches it, a "Temporary local problem" will result. > > > > * With DKIM the verifier uses DNS to retrieve the signer's public key to > verify the signed mail. > > DKIM: > https://en.wikipedia.org/wiki/DomainKeys_Identified_Mail > > The lookup failing likely means the DNS lookup timed out. DNS [normally] > uses > UDP which means the packets are not guaranteed to arrive, so these can get > lost if (for instance) the packet queue on the router or switch is full > such > that some incoming packets have to be dropped. > > > and for successfull outgoing emails normally log describes > > * SMTP Outbound Connection .. > > what does that means ? > > Without context it's hard to know, but it sounds like what it says -- that > an > outbound SMTP connection is/was made. > > -- Chris > > -- > Chris Knadle > [email protected] > > -- > ## 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/ > -- ## 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/
