Yea I did the same thing too. I noticed it earlier but tought that it would come back up, but it never did and it did cause alot of rejects. Once I removed them, everyting worked fine again.
----- Original Message ----- From: "Len Conrad" <[EMAIL PROTECTED]> To: <[EMAIL PROTECTED]> Sent: Thursday, July 10, 2003 3:35 AM Subject: [IMGate] The bad side of RBL > > When a RBL server your postfix is using goes off-line, postfix will > continue to query it, taking a lot longer, 10s of seconds, to accept each > incoming mail. Each SMTPD process lasts a lot longer and so if you hit > the default max of 50 SMTPD processes, incoming mail will be refused. > > I had call yesterday from an IMGate user who said his mail volumes were way > down. The problem was osirusoft being unreachable. I removed osirusoft > from his smtpd restrictions about 19:00 and look at the results: > > Per-Hour Traffic Summary > time received delivered deferred bounced rejected > -------------------------------------------------------------------- > 0000-0100 2117 393 9 4 1353 > 0100-0200 2216 431 13 2 1400 > 0200-0300 2220 263 5 2 1420 > 0300-0400 2303 235 3 1 1486 > 0400-0500 2261 237 3 0 1428 > 0500-0600 1867 226 3 2 1023 > 0600-0700 1813 321 1 2 857 > 0700-0800 1732 504 2 1 644 > 0800-0900 1788 459 7 3 692 > 0900-1000 1941 623 6 2 695 > 1000-1100 1835 749 14 5 494 > 1100-1200 2005 910 27 3 563 > 1200-1300 2162 1158 24 6 571 > 1300-1400 1810 655 27 5 605 > 1400-1500 1799 554 11 2 623 > 1500-1600 1997 667 17 6 674 > 1600-1700 1963 552 194 4 747 > 1700-1800 2091 616 19 1 830 > 1800-1900 1927 589 28 3 696 > 1900-2000 1891 793 22 1 578 > 2000-2100 7136 3271 4204 3 > 4036<osirus removed > 2100-2200 7918 3841 383 13 5083 > 2200-2300 6491 2117 33 4 4886 > 2300-2400 6310 1324 18 5 5769 > > postfix opened up again to full speed, both for accepting and delivering > messages as well as rejecting messages. > > ( the huge number of deferrals 4200 had nothing to do with the osirus RBL, > but his IMGate was also screwed up and giving a lot of "connection refused" > to IMGate, so the I was repeatedly flush the queue as he tried to get IMail > to behave. ) > > For low-volume servers, a dead RBL is no big deal, but for higher volume > IMGates, it can really restrict. > > I guess I need to work on some maillog scripts that monitor deferrals to > the mail box server (Imail not accepting mail) and monitor failures to > lookup RBL servers. > > Len > > >
