On 19 May 2005, at 9:44, Javier Navarro wrote: > Hi > Last days I've been using RDNS and RBL (sbl-xbl.spamhaus.org) ckecks > and many of my customers had problems. Some because they couldn't > receive e-mail from other ISPs that didn't configure RDNS and others > because they couldn't receive mail from blacklisted IPs. > > I'm having RDNS problems even with important companies here in Spain > and it's dificult to explain my customers that this is caused by > other's bad configuration. My customers say: "Yesterday I could > recive from XXXX and now I can't. What did you changed?". And some > of these important companies say they can't set a RDNS record since > they host several services per IP. > > I write to ask you about your experience with RDNS and RBLs. What > configuration do you use? What RBL servers do you use?
I have "SMTP-RDNSCheck" "-2" after finding I was rejecting emails from the local council (their RDNS has subsequently been fixed and had previously been OK but went missing for a couple of months when they changed ISP). That happened on same day I tried rejecting on no RDNS and I was able to determine as far as their email client was concerned a delay of 7 seconds was too much and with 4 seconds mail came through. What I've found effective is setting a delay for IP blocks in spammers.tab and "SMTP-MaxErrors" "2" which seems to result in rejection of majority of incoming spam here and so far no false positives (home user so don't get that much email anyway). David - To unsubscribe from this list: send the line "unsubscribe xmail" in the body of a message to [EMAIL PROTECTED] For general help: send the line "help" in the body of a message to [EMAIL PROTECTED] - To unsubscribe from this list: send the line "unsubscribe xmail" in the body of a message to [EMAIL PROTECTED] For general help: send the line "help" in the body of a message to [EMAIL PROTECTED]
