I think I see a (tangential) miscommunication in this thread. On Tue, 2007-07-17, SM wrote:
> At 10:22 17-07-2007, Dilyan Palauzov wrote: >>Let's limit us now on hosts, that do not offer PRDR. >> >>** 550 Mail for [EMAIL PROTECTED] rejected ** >> >> > The 550 code means that mail to the above-mentioned recipients >> ([EMAIL PROTECTED] and >> > [EMAIL PROTECTED] was rejected for policy reasons. A DSN >> may be sent by server.example.com >> > to both recipients. The recipients may not see your reject >> message or they may not understand it. >> >>Is there any software nowadays, that sends DSN to the recipients >>telling them that they cannot receive emails? > Some MTAs still send DSNs to the recipients to inform them that their > email could not be delivered. For example, if this email is not > accepted by the mail server that operates this mailing list, I will > get a DSN from my mail server. I believe that the first mention of DSNs above should have said: A DSN may be sent by server.example.com to _the original message's bounce address on behalf of_ both recipients. I don't believe that an MTA would send a Delivery Status Notification to _recipients_ that it has determined should not get the original message! I don't think that this materially affects this discussion but I thought I would point it out. -- Bill McQuillan <[EMAIL PROTECTED]>
