On 6/4/2012 4:24 PM, Nigel Metheringham wrote: > > Chip wrote: >> First, do the users of VERP experience greater deliverable rates >> compared to those senders who forgo VERP? > VERP will not directly improve deliverability. > It will allow you to more quickly and accurately identify addresses that > are not deliverable, and remove them from future mailings, so indirectly > it will increase the percentage of messages that are deliverable by > removing no hopers. > However this comes at a cost of requiring a single delivery per > recipient (which you may already require if you do any message > personalisation or tracking). > >> It would be great to know if >> implementing it in addition to other best-practices helps in deliverable >> rates. (In our setup the Mail User Agent can only create VERP headers >> when using phpmailer and not SMTP, and therefore an unsubscribe link in >> the headers cannot be created, perhaps adding to lower deliverablity rates?) >> >> Secondly, would we be better of getting Exim to produce the VERP >> error-to headers rather than our Mail User Agent -- would doing so cut >> down on overhead and processing memory? > I can't comment on the deliverable rates - it sounds like you are > working in a marketing type application, which is not where my > experience lies. > > You can do VERP at either MUA or MTA level (although the MTA has to be > at least partially aware of VERP to allow capturing of any bounce > messages). It sounds like you have some reasons to do this within the > MTA due to your MUA functionality. That should work fine. In general > handling VERP in the MUA allows more flexibility in things such as > deliverability tracking (against, say, message content). However this > is unlikely to be a major difference. > > The exim mailing list does VERP at the list processing level rather than > within the MTA - this allows us to use VERP for some, but not all, > deliveries, which is a bandwidth compromise that works for us. > > Nigel. > Thanks for the information. Our MUA has no capability to insert unsubscribe links in the headers and I know that reduces deliverable scores. So I can either opt to use the Exim MTA to create VERP data (in which case we use SMTP and get built-in unsubscribe links) or keep our MUA and use Exim to modify headers with personalized unsubscribed links. Either choice carries their difficulties for our company and experience level, although I believe we can get through this.
Let me ask this: can someone explain the workflow within the the exim.conf which would allow us to create VERP data? I have read numerous online threads about just the part that creates the VERP data but I cannot understand how that fits in within the entire framework and flow of a daunting exim.conf file. Again, once I understand that part I can be more specific with additional questions -- but this is good, and I'm learning bit by bit. Thanks you. -- ## List details at https://lists.exim.org/mailman/listinfo/exim-users ## Exim details at http://www.exim.org/ ## Please use the Wiki with this list - http://wiki.exim.org/
