Hello, with greylisting, ASSP will send an SMTP Reply to resend the email later: 451 4.7.1 Please try again in three minutes - Greylisting
The SMTP protocol defines that all 4xx errors are non permanent and the Server should try it later. Normaly, the sending server just retries it again and again until he gets an ok, an permanent error (5xx) or a OK Messagae (2xx) He should only send a error message to the end user if the final delivery fails (after max tries - eg 48h) or if it gets an 5xx error. So you won't see any bounce messages and your users will not be informed. The Sending server just retries it some minutes later an delivers his mail. The only disadvantages are that the first from any user will took some minutes longer and that mail from mayor providers won't get to your server as the sending IP changes on every delivery. These servers should be excluded from greylisting (Which is assp default) Greylisting is a common practice, so nearly all MTAs handle them as expected. Matti b> Will all my valid senders now face a new bounce issue? b> I understand Grey/Delay will do most of the work since valid servers will b> resend to b> put them selves on the whitelist. does this happen automatically? im not b> sure. b> even so, our clients will complain about bounced mail while the triplets b> form, right? -- Matti Haack - Hit Haack IT Service Gmbh Poltlbauer Weg 4, D-94036 Passau +49 851 50477-22 Fax: +49 851 50477-29 http://www.haack-it.de ------------------------------------------------------------------------------ Create and Deploy Rich Internet Apps outside the browser with Adobe(R)AIR(TM) software. With Adobe AIR, Ajax developers can use existing skills and code to build responsive, highly engaging applications that combine the power of local resources and data with the reach of the web. Download the Adobe AIR SDK and Ajax docs to start building applications today-http://p.sf.net/sfu/adobe-com _______________________________________________ Assp-user mailing list [email protected] https://lists.sourceforge.net/lists/listinfo/assp-user
