* Rafael Azevedo <raf...@gmail.com>: > It seems that POSTFIX is checking the DNS for that domain (ZOOM4U) and > for some reason its taking too long.
Do you have a caching DNS server? Also please note that the delays(c) value consists of 4 different timings: 1) time in connection setup, 2) including DNS, 3) EHLO and 4) STARTTLS so you cannot know if: * the connection setup is slow * DNS (finding and resolving the MX)is slow, * if EHLO (or EHLO checks on the receiving side!) or * STARTTLS are slow (if it's being used at all...) You CAN check the timings using debug_peer_list = ... but not to a sub second resolution(since syslog()) is being used. -- Ralf Hildebrandt Geschäftsbereich IT | Abteilung Netzwerk Charité - Universitätsmedizin Berlin Campus Benjamin Franklin Hindenburgdamm 30 | D-12203 Berlin Tel. +49 30 450 570 155 | Fax: +49 30 450 570 962 ralf.hildebra...@charite.de | http://www.charite.de
