I received reports that several messages I'd sent had not been received by the recipients within a reasonable timeframe and apparently still haven't been many hours later. Subsequently, a bunch of test messages sent at stupid o'clock via the relay/ironport(out) route were found to simply disappear. Others received odd error messages various similar to those posted by me and other users although some of these were regrettably down to my fat fingers introducing a sneaky typo that I didn't spot until very much later unfortunately
However, excluding those with typo issues, the same test messages sent direct to PN A/Cs via ironport(in) were accepted and delivered. The same test messages sent via postini (to PN/postini enabled A/Cs only of course) were also accepted and delivered. If that doesn't demonstrate a problem with ironport(out) then I don't know what the h*ll does. It also indicates that the performance of ironport(out) is perhaps substantially different from ironport(in) for some strange and unexplained reason (and in the 'wrong' sense for that matter because 'out' filtering appears to be more severe and draconian than 'in' filtering) despite your constant assurances that any filtering is always set to mild/conservative or whatever.
Please note that by ironport(in) I mean not using relay.plus.net but simply SMTPing to mx-ironport.core.plus.net as any external system would and by ironport(out) I am referring to wherever mail gets passed to after being accepted by relay.plus.net because I haven''t yet had time to find out if they are one and the same and if not try that route directly rather than via relay.plus.net.
Please also note that the fact my main A/C has filtering disabled is almost completely irrelevant in this discussion because as you are well aware, I have several A/Cs all of which are intentionally configured differently for a variety of reasons including for proving whether PN's announcements, statements, explanations or denials are in fact correct as well as for assessing performance of the mail platform in general. The problem as I see it now is that whilst I can possibly just about guarantee receiving all my incoming mail by disabling PN filtering as/when necessary it would now appear that I cannot in any way guarantee that my outgoing mail will actually be sent despite being formally accepted by PN. In addition to this, it also depends on which particular route I happen to send it.
Silent deletion of anything is fundamentally wrong and it will remain fundamentally wrong no matter how many times PN try to implement it, no matter what possible reasons PN may have for doing so and no matter how anyone tries to justify it as being acceptable and reasonable practice. Occasional 'lost' data is a sad fact of life (and hopefully has a very small probability of occurring) but the intentional quiet dumping of customers' data without notification for whatever reason is most certainly not acceptable and nor should it be a sad fact of life.
No one would ever accept the guy at the Post Office counter or Royal Mail in general arbitrarily choosing which mail to try to deliver from all the mail they have accepted and then putting the rest straight into the recycling bin. Likewise, no one would ever accept the Postman arbitrarily choosing which mail to put through the letter box and then putting the rest straight into the recycling bin either. But paying ISP customers are apparently expected to lie back, think of England and accept this as 'normal' and 'good' practice when it comes to e-mail. It isn't.
I'm fairly sure that you already have examples of messages being silently deleted on receipt from ages ago so I would suggest that you might like to try these out again on both ironport(in) as well as ironport(out) and report your findings here because unless something has changed since stupid o'clock this morning, there's something not quite right and it's not performing as you would like me and other customers to believe that it is.
If I get some spare time later then I will investigate further, if not then I will have to leave it to you/PN to investigate ... and either fix it or provide a 100% guarantee that things are exactly as they should be and that no genuine mail is or will ever be lost because ironport is *that* good ... placing money where mouth is is always guaranteed to focus the mind and all that