D G Teed wrote:
On Fri, Dec 18, 2009 at 7:52 PM, Wietse Venema <wie...@porcupine.org <mailto:wie...@porcupine.org>> wrote:
Due to the hardwired default of 450, all sent mail becomes sluggish on the Exchange queue as hundreds of messages are retried every few minutes (one mistyped domain in a mail list triggers this behaviour in MS Exchange).
Every few minutes ? Maybe MS Exchange behaviour is wrong : From RFC 5321 : The sender MUST delay retrying a particular destination after one attempt has failed. In general, the retry interval SHOULD be at least 30 minutes; however, more sophisticated and variable strategies will be beneficial when the SMTP client can determine the reason for non-delivery. --
