[xmail] Re: RDNS and RBLsquestion
Using a rbl (and spamhaus is a good one) and others tools like RDNS, = GLST, AV, anti-spam, ... is not a problem IF you take care to advertise your = users (if possible before effective deployment date) and explain them = advantages and possible problems (and how to explain problem to their contacts ... = a reference page in your site can help ...). So educated users will not ask you for this type of problems ... (or = only a few 'irreducible' ..) At this time I don't use RDNS nor Checkmailer domain due to too many = badly configured domains, especially domains hosted on access providers in = their packages, sheep hosting providers, reducing cost to minimum so = discarding any no absolutely necessary configurations like PTR, since they are not 'forced' by smtp related rfc's to do them to function (not mandatory). I think Internet have to change definitively to a new safe mail = protocol ... In the hope SMTP that 'Simple Mail Transport Protocol' becomes 'Safe = Mail Transport Protocol' (smtp + mandatory thinks like spf, ... for example) = ;-) But problem is 'backward compatibility' and until you accept old smtp, = you don't resolve the problem definitively. Or all Internet need to switch at the same time to new protocol with no = more backward compatibility. (option is to allow mixed environment for some months, 2 years ? seems = to me good enough, then only accept new protocol) Francis -Message d'origine- De : Javier Navarro [mailto:[EMAIL PROTECTED] Envoy=E9 : jeudi 19 mai 2005 09:44 =C0 : xmail@xmailserver.org Objet : [xmail] RDNS and RBLsquestion =20 =20 Hi Last days I've been using RDNS and RBL=20 (sbl-xbl.spamhaus.org) ckecks and many of my customers had=20 problems. Some because they couldn't receive e-mail from=20 other ISPs that didn't configure RDNS and others because they=20 couldn't receive mail from blacklisted IPs. =20 I'm having RDNS problems even with important companies here=20 in Spain and it's dificult to explain my customers that this=20 is caused by other's bad configuration. My customers say:=20 Yesterday I could recive from and now I can't. What did=20 you changed?. And some of these important companies say they=20 can't set a RDNS record since they host several services per IP. =20 I write to ask you about your experience with RDNS and=20 RBLs. What configuration do you use? What RBL servers do you use? =20 Thanks, =20 Javier Navarro =20 =20 - 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] =20 - 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] - 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]
[xmail] Re: RDNS and RBLsquestion
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 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]
[xmail] Re: RDNS and RBLsquestion
Using a rbl (and spamhaus is a good one) and others tools like RDNS, = GLST, AV, anti-spam, ... is not a problem IF you take care to advertise your = users (if possible before effective deployment date) and explain them = advantages and possible problems (and how to explain problem to their contacts ... = a reference page in your site can help ...). So educated users will not ask you for this type of problems ... (or = only a few 'irreducible' ..) At this time I don't use RDNS nor Checkmailer domain due to too many = badly configured domains, especially domains hosted on access providers in = their packages, sheep hosting providers, reducing cost to minimum so = discarding any no absolutely necessary configurations like PTR, since they are not 'forced' by smtp related rfc's to do them to function (not mandatory). I think Internet have to change definitively to a new safe mail = protocol ... In the hope SMTP that 'Simple Mail Transport Protocol' becomes 'Safe = Mail Transport Protocol' (smtp + mandatory thinks like spf, ... for example) = ;-) But problem is 'backward compatibility' and until you accept old smtp, = you don't resolve the problem definitively. Or all Internet need to switch at the same time to new protocol with no = more backward compatibility. (option is to allow mixed environment for some months, 2 years ? seems = to me good enough, then only accept new protocol) Francis -Message d'origine- De : Javier Navarro [mailto:[EMAIL PROTECTED] Envoy=E9 : jeudi 19 mai 2005 09:44 =C0 : xmail@xmailserver.org Objet : [xmail] RDNS and RBLsquestion =20 =20 Hi Last days I've been using RDNS and RBL=20 (sbl-xbl.spamhaus.org) ckecks and many of my customers had=20 problems. Some because they couldn't receive e-mail from=20 other ISPs that didn't configure RDNS and others because they=20 couldn't receive mail from blacklisted IPs. =20 I'm having RDNS problems even with important companies here=20 in Spain and it's dificult to explain my customers that this=20 is caused by other's bad configuration. My customers say:=20 Yesterday I could recive from and now I can't. What did=20 you changed?. And some of these important companies say they=20 can't set a RDNS record since they host several services per IP. =20 I write to ask you about your experience with RDNS and=20 RBLs. What configuration do you use? What RBL servers do you use? =20 Thanks, =20 Javier Navarro =20 =20 - 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] =20 - 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]
[xmail] Re: RDNS and RBLsquestion
This was a problem dificult to solve for me. After several months of disscusions with other domain admin´s , I choose to not check RDNS in order to keep my clients happy (almost). There´s too much domains without RDNS config and many more admins who doesn´t know (IMHO) what is exactly RDNS. RDNS in Xmail is a great feature. The world is not ready to a full use, I think. Sergio 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 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? Thanks, Javier Navarro - 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] - 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]
[xmail] Re: RDNS and RBLsquestion
At 10.37 20/05/05 +0200, you wrote: Now I'm using Spamhaus, Ordb and Spamcop as RBL servers, do you advise any others? The list of DNSBL is very dependent on your special needs (and geographical location, I think). You have to experiment a bit for yourself. I'm using spamcop, njabl, spamhaus and sorbs (in this order). Spamhaus and njabl are 0% false positives (my experience dating back to 2003). Spamcop catches the most junk but you have to add some lines in your whitelist. Sorbs too needs some whitelisting. Not too much, in either case. Together, the four reject between 80% and 90% of all incoming SMTP connections every day ... Ciao, Francesco - 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]
[xmail] Re: RDNS and RBLsquestion
Sergio Perrone wrote: This was a problem dificult to solve for me. After several months of disscusions with other domain admin´s , I choose to not check RDNS in order to keep my clients happy (almost). There´s too much domains without RDNS config and many more admins who doesn´t know (IMHO) what is exactly RDNS. RDNS in Xmail is a great feature. The world is not ready to a full use, I think. Yes, my recommendation is to use -X at this feature, so remote hosts without RDNS will be delayed with delivery. There are too many lame admins out there :( And for your customers / users it seems to be your fault if your mailserver rejects mails from valid accounts. That's our job :| - 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]
[xmail] Re: RDNS and RBLsquestion
At 10.37 20/05/05 +0200, you wrote: Now I'm using Spamhaus, Ordb and Spamcop as RBL servers, do you advise any others? The list of DNSBL is very dependent on your special needs (and geographical location, I think). You have to experiment a bit for yourself. I'm using spamcop, njabl, spamhaus and sorbs (in this order). Spamhaus and njabl are 0% false positives (my experience dating back to 2003). Spamcop catches the most junk but you have to add some lines in your whitelist. Sorbs too needs some whitelisting. Not too much, in either case. Together, the four reject between 80% and 90% of all incoming SMTP connections every day ... Ciao, Francesco - 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]
[xmail] Re: RDNS and RBLsquestion
Thanks all, I'll experiment :-) *** Mensaje original *** El d=EDa 27/05/2005 a las 12:29 Francesco Vertova escribi=F3: At 10.37 20/05/05 +0200, you wrote: Now I'm using Spamhaus, Ordb and Spamcop as RBL servers, do you advise any others? The list of DNSBL is very dependent on your special needs (and geographical location, I think). You have to experiment a bit for yourself. I'm using spamcop, njabl, spamhaus and sorbs (in this order). Spamhaus and njabl are= 0% false positives (my experience dating back to 2003). Spamcop catches the most junk but you have to add some lines in your whitelist. Sorbs too needs some whitelisting. Not too much, in either case. Together, the four reject between 80% and 90% of all incoming SMTP connections every day ... Ciao, Francesco - 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] *** Fin del mensaje original *** - 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]
[xmail] Re: RDNS and RBLsquestion
Using a rbl (and spamhaus is a good one) and others tools like RDNS, = GLST, AV, anti-spam, ... is not a problem IF you take care to advertise your = users (if possible before effective deployment date) and explain them = advantages and possible problems (and how to explain problem to their contacts ... = a reference page in your site can help ...). So educated users will not ask you for this type of problems ... (or = only a few 'irreducible' ..) At this time I don't use RDNS nor Checkmailer domain due to too many = badly configured domains, especially domains hosted on access providers in = their packages, sheep hosting providers, reducing cost to minimum so = discarding any no absolutely necessary configurations like PTR, since they are not 'forced' by smtp related rfc's to do them to function (not mandatory). I think Internet have to change definitively to a new safe mail = protocol ... In the hope SMTP that 'Simple Mail Transport Protocol' becomes 'Safe = Mail Transport Protocol' (smtp + mandatory thinks like spf, ... for example) = ;-) But problem is 'backward compatibility' and until you accept old smtp, = you don't resolve the problem definitively. Or all Internet need to switch at the same time to new protocol with no = more backward compatibility. (option is to allow mixed environment for some months, 2 years ? seems = to me good enough, then only accept new protocol) Francis -Message d'origine- De : Javier Navarro [mailto:[EMAIL PROTECTED] Envoy=E9 : jeudi 19 mai 2005 09:44 =C0 : xmail@xmailserver.org Objet : [xmail] RDNS and RBLsquestion =20 =20 Hi Last days I've been using RDNS and RBL=20 (sbl-xbl.spamhaus.org) ckecks and many of my customers had=20 problems. Some because they couldn't receive e-mail from=20 other ISPs that didn't configure RDNS and others because they=20 couldn't receive mail from blacklisted IPs. =20 I'm having RDNS problems even with important companies here=20 in Spain and it's dificult to explain my customers that this=20 is caused by other's bad configuration. My customers say:=20 Yesterday I could recive from and now I can't. What did=20 you changed?. And some of these important companies say they=20 can't set a RDNS record since they host several services per IP. =20 I write to ask you about your experience with RDNS and=20 RBLs. What configuration do you use? What RBL servers do you use? =20 Thanks, =20 Javier Navarro =20 =20 - 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] =20 - 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]
[xmail] Re: RDNS and RBLsquestion
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 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]
[xmail] Re: RDNS and RBLsquestion
This was a problem dificult to solve for me. After several months of disscusions with other domain admin´s , I choose to not check RDNS in order to keep my clients happy (almost). There´s too much domains without RDNS config and many more admins who doesn´t know (IMHO) what is exactly RDNS. RDNS in Xmail is a great feature. The world is not ready to a full use, I think. Sergio 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 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? Thanks, Javier Navarro - 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]
[xmail] Re: RDNS and RBLsquestion
Sergio Perrone wrote: This was a problem dificult to solve for me. After several months of disscusions with other domain admin´s , I choose to not check RDNS in order to keep my clients happy (almost). There´s too much domains without RDNS config and many more admins who doesn´t know (IMHO) what is exactly RDNS. RDNS in Xmail is a great feature. The world is not ready to a full use, I think. Yes, my recommendation is to use -X at this feature, so remote hosts without RDNS will be delayed with delivery. There are too many lame admins out there :( And for your customers / users it seems to be your fault if your mailserver rejects mails from valid accounts. That's our job :| - 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]
