Using debug (spamd -D) i've found it takes a long time on URIDNSBL:
this is during startup:
debug: plugin: loading Mail::SpamAssassin::Plugin::URIDNSBL from @INC
debug: plugin: registered Mail::SpamAssassin::Plugin::URIDNSBL=HASH(0x8a10224)
debug: plugin: loading Mail::SpamAssassin::Plugin::Hashcash from @INC
debug: plugin: registered Mail::SpamAssassin::Plugin::Hashcash=HASH(0x89f1cc0)
debug: plugin: loading Mail::SpamAssassin::Plugin::SPF from @INC
debug: plugin: registered Mail::SpamAssassin::Plugin::SPF=HASH(0x8a43440)
debug: plugin: Mail::SpamAssassin::Plugin::URIDNSBL=HASH(0x8a10224) implements 'parse_config'
debug: plugin: Mail::SpamAssassin::Plugin::Hashcash=HASH(0x89f1cc0) implements 'parse_config'
debug: config: SpamAssassin failed to parse line, skipping: !__UNUSABLE_MSGID)
debug: plugin: Mail::SpamAssassin::Plugin::URIDNSBL=HASH(0x8a10224) inhibited further callbacks
debug: plugin: Mail::SpamAssassin::Plugin::URIDNSBL=HASH(0x8a10224) inhibited further callbacks
debug: plugin: Mail::SpamAssassin::Plugin::URIDNSBL=HASH(0x8a10224) inhibited further callbacks
debug: plugin: Mail::SpamAssassin::Plugin::URIDNSBL=HASH(0x8a10224) inhibited further callbacks
debug: plugin: Mail::SpamAssassin::Plugin::URIDNSBL=HASH(0x8a10224) inhibited further callbacks
debug: plugin: Mail::SpamAssassin::Plugin::URIDNSBL=HASH(0x8a10224) inhibited further callbacks
debug: plugin: Mail::SpamAssassin::Plugin::URIDNSBL=HASH(0x8a10224) inhibited further callbacks
debug: plugin: Mail::SpamAssassin::Plugin::URIDNSBL=HASH(0x8a10224) inhibited further callbacks
debug: plugin: Mail::SpamAssassin::Plugin::URIDNSBL=HASH(0x8a10224) inhibited further callbacks
debug: plugin: Mail::SpamAssassin::Plugin::URIDNSBL=HASH(0x8a10224) inhibited further callbacks
debug: plugin: Mail::SpamAssassin::Plugin::URIDNSBL=HASH(0x8a10224) inhibited further callbacks
debug: plugin: Mail::SpamAssassin::Plugin::URIDNSBL=HASH(0x8a10224) inhibited further callbacks
debug: plugin: Mail::SpamAssassin::Plugin::URIDNSBL=HASH(0x8a10224) inhibited further callbacks
debug: plugin: Mail::SpamAssassin::Plugin::URIDNSBL=HASH(0x8a10224) inhibited further callbacks
debug: plugin: Mail::SpamAssassin::Plugin::URIDNSBL=HASH(0x8a10224) inhibited further callbacks
debug: plugin: Mail::SpamAssassin::Plugin::URIDNSBL=HASH(0x8a10224) inhibited further callbacks
debug: plugin: Mail::SpamAssassin::Plugin::URIDNSBL=HASH(0x8a10224) inhibited further callbacks
debug: plugin: Mail::SpamAssassin::Plugin::URIDNSBL=HASH(0x8a10224) inhibited further callbacks
debug: plugin: Mail::SpamAssassin::Plugin::URIDNSBL=HASH(0x8a10224) inhibited further callbacks
debug: plugin: Mail::SpamAssassin::Plugin::URIDNSBL=HASH(0x8a10224) inhibited further callbacks
debug: plugin: Mail::SpamAssassin::Plugin::URIDNSBL=HASH(0x8a10224) inhibited further callbacks
debug: plugin: Mail::SpamAssassin::Plugin::URIDNSBL=HASH(0x8a10224) inhibited further callbacks
debug: plugin: Mail::SpamAssassin::Plugin::URIDNSBL=HASH(0x8a10224) inhibited further callbacks
debug: plugin: Mail::SpamAssassin::Plugin::URIDNSBL=HASH(0x8a10224) inhibited further callbacks
debug: plugin: Mail::SpamAssassin::Plugin::URIDNSBL=HASH(0x8a10224) inhibited further callbacks
debug: plugin: Mail::SpamAssassin::Plugin::URIDNSBL=HASH(0x8a10224) inhibited further callbacks
debug: plugin: Mail::SpamAssassin::Plugin::URIDNSBL=HASH(0x8a10224) inhibited further callbacks
debug: plugin: Mail::SpamAssassin::Plugin::URIDNSBL=HASH(0x8a10224) inhibited further callbacks
debug: plugin: Mail::SpamAssassin::Plugin::URIDNSBL=HASH(0x8a10224) inhibited further callbacks
debug: plugin: Mail::SpamAssassin::Plugin::URIDNSBL=HASH(0x8a10224) inhibited further callbacks
debug: plugin: Mail::SpamAssassin::Plugin::URIDNSBL=HASH(0x8a10224) inhibited further callbacks
debug: plugin: Mail::SpamAssassin::Plugin::URIDNSBL=HASH(0x8a10224) inhibited further callbacks
this is during massage check:
debug: URIDNSBL: query for cuni.cz took 5 seconds to look up (multi.surbl.org.:cuni.cz) debug: URIDNSBL: query for line.ru took 5 seconds to look up (multi.surbl.org.:line.ru) debug: URIDNSBL: query for petritsch.net took 4 seconds to look up (multi.surbl.org.:petritsch.net) debug: URIDNSBL: query for apollo.lv took 3 seconds to look up (multi.surbl.org.:apollo.lv) debug: URIDNSBL: query for flexnet.com.br took 4 seconds to look up (multi.surbl.org.:flexnet.com.br) debug: URIDNSBL: query for lcpc.fr took 5 seconds to look up (multi.surbl.org.:lcpc.fr) debug: URIDNSBL: query for lauchringen.de took 4 seconds to look up (multi.surbl.org.:lauchringen.de) debug: URIDNSBL: query for blackbox.at took 4 seconds to look up (multi.surbl.org.:blackbox.at) debug: URIDNSBL: query for haifa.ac.il took 4 seconds to look up (multi.surbl.org.:haifa.ac.il) debug: URIDNSBL: query for videotron.ca took 4 seconds to look up (multi.surbl.org.:videotron.ca) debug: URIDNSBL: query for land.ru took 4 seconds to look up (multi.surbl.org.:land.ru) debug: URIDNSBL: query for uib.no took 4 seconds to look up (multi.surbl.org.:uib.no) debug: URIDNSBL: query for co.rockland.ny.us took 4 seconds to look up (multi.surbl.org.:co.rockland.ny.us) debug: URIDNSBL: query for yahoo.fr took 3 seconds to look up (multi.surbl.org.:yahoo.fr) debug: URIDNSBL: query for chita.ru took 3 seconds to look up (multi.surbl.org.:chita.ru) debug: URIDNSBL: query for mirea.ru took 3 seconds to look up (multi.surbl.org.:mirea.ru) debug: URIDNSBL: query for nwgsm.com took 51 seconds to look up (multi.surbl.org.:nwgsm.com) debug: URIDNSBL: query for dowjones.com took 52 seconds to look up (multi.surbl.org.:dowjones.com) debug: URIDNSBL: query for tuerkisch-van.ch took 51 seconds to look up (multi.surbl.org.:tuerkisch-van.ch) debug: URIDNSBL: query for cma.net took 52 seconds to look up (multi.surbl.org.:cma.net) debug: URIDNSBL: query for bmstu.ru took 51 seconds to look up (multi.surbl.org.:bmstu.ru) debug: URIDNSBL: query for nctimes.net took 52 seconds to look up (multi.surbl.org.:nctimes.net) debug: URIDNSBL: query for units.it took 51 seconds to look up (multi.surbl.org.:units.it) debug: URIDNSBL: query for xsens.com took 99 seconds to look up (multi.surbl.org.:xsens.com) debug: URIDNSBL: query for wissen.de took 219 seconds to look up (multi.surbl.org.:wissen.de) debug: URIDNSBL: query for uta.fi took 219 seconds to look up (multi.surbl.org.:uta.fi) debug: URIDNSBL: query for pa.net took 219 seconds to look up (multi.surbl.org.:pa.net) debug: URIDNSBL: query for kaspersky.com took 220 seconds to look up (multi.surbl.org.:kaspersky.com) debug: URIDNSBL: query for cna.com.ua took 220 seconds to look up (multi.surbl.org.:cna.com.ua) debug: URIDNSBL: query for menta.net took 219 seconds to look up (multi.surbl.org.:menta.net) debug: URIDNSBL: query for cityline.ru took 220 seconds to look up (multi.surbl.org.:cityline.ru) debug: URIDNSBL: query for peacelink.it took 220 seconds to look up (multi.surbl.org.:peacelink.it) debug: URIDNSBL: query for mdx.ac.uk took 219 seconds to look up (multi.surbl.org.:mdx.ac.uk) debug: URIDNSBL: query for yahoo.gr took 219 seconds to look up (multi.surbl.org.:yahoo.gr) debug: URIDNSBL: query for webplus.ru took 220 seconds to look up (multi.surbl.org.:webplus.ru) .....
