Quote:
Originally Posted by jackclare
---------- Post added at 12:16 ---------- Previous post was at 12:11 ----------
Seem to have made a mess of this reply. However , the last time I looked spamhaus and spamcop showed no block but uceprotect.net showed a level3 block on 81.103.221.10. Messages are now coming through but it looks as though this is another agent being used by NTL
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Hmm.....that will hit ntl email users sending through ntl servers when the recipeint server uses that block list.
---------- Post added at 13:58 ---------- Previous post was at 13:50 ----------
Quote:
Originally Posted by Tiko
Thanks Toto. That does help a little and having found this forum I was beginning to pick up that much.
So ntl could say the emails will be discarded if they come from a server with an IP address on X or Y blocklists.
What I was getting at is why couldn't ntl make it easy to find out that they use block lists and tell us which ones so that we can check for ourselves if mail is likely to be missing. Up to now I only have the info on this forum to say this is what happens.
Can I accept your answer as the definitive and up to date list of blocklists used by ntl? and which of the various lists at Spamhaus, say, is it ntl uses ? Are you privy to ntl policy and practice on this issue ? With what authority ?
Spamhause own site says:
"We ask, but do not require, that all ISPs using the SBL and/or XBL inform customers of the fact you run spam filters (simply because it is the correct thing to do). Use of known-to-be-effective spam blocklists is normally seen as a service advantage and strong sales point. All SBL and XBL Users are welcome to use the email protected by SBL and XBL web badges on sites"
By giving the option of having some SPAM marked and directed to a particular mail folder and saying nothing of emails being rejected ntl gives the impression that no emails are being discarded even before that stage.
If emails coming from IPs on the spamhaus/spamcop lists are discarded outright before the end user gets the chance to see it, then which SPAM is marked and put under the end user control if that option is chosen ?
I must admit that although I can see arguments both ways the risk of losing good emails (and not even knowing about it) seems to outway the benefits of this method of fighting unwanted email and I want to know what the risk is before signing up for a package which includes email.
Any comment on the crass response from ntl to my enquiry ?
You, presumably not employed by ntl and paid to help their potential customers, have done more than their staff to give me info about their system. Quite honestly that response is enough to put me off them without even getting the info about their email handling.
I need to check out this Brightmail thing as well.
---------- Post added at 10:10 ---------- Previous post was at 10:01 ----------
I understand that you were trying to be helpful - but ...
How would I know the SMTP server of the sender of an email I don't even know I haven't received because it has been completely silently discarded with no info to the sender or intended recipient?
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OK, kind of left something out of my response.....sorry
Any network that is prevented from sending email at the first stage, block list check, their server receives an error message telling them that their server is on a block list, including a URL to reference their blocked status. That mail server admin team can then resolve the issue with the block list host.
So whilst the intended recipient of the email will not know that a mail sent to them has failed due to blocking, the sender of that email, or their network operator should.
Worth keeping in mind also is that the lists are dynamic, and many blocked networks become unblocked after a period of time, even if the network has not taken sufficient action in time to resolve the issue.
I think that ntl technical support chaps send out an email to a customer who has contacted them regarding a blocked email issue, the answer they give is probably better than mine as they will have better knowledge of the process.
Hope that helps.