On 12 Jun 2007, at 9:41, Hal Dell wrote: > > Hello All... I have a sender who is using our xMail infrastructure to send > eMails and one such eMail address is associated with the destination eMail > Server mail22.webcontrolcenter.com which has implemented Greylisting (For > those not familiar with Greylisting is a process by which the remote MTA > rejects the eMail from a sender the first time -- every time -- assuming > that a SPAM bot or alike does not have the ability to resend). > > The problem is that I received the error code and message "451 Greylisted, > please try again in 900 seconds". In the case of xMail it did not retry to > send the eMail. > > According to RFC2505, 4xx are Transient Negative Completion reply (Temporary > Error) and should result in the mail transfer being put back on queue again > and a new attempt being made later.
That doesn't seem right, as greylisting has been taken up by more providers I've seen temporary failure many times but xmail retries and either delivers or eventually gives up and I get an unable to deliver message. Only unable to deliver have been whilst testing and not to real addresses. Xmail default here was a notification after first temporary failure then after complete failure which might be 4 - 5 days later. I modified notification settings to 1,6,9 attempts but any that have hit 6, all test emails, never get through at all. If I'm desperate I check what is still in spool file that xmail is still trying. One unlikely possibility is the greylisting accept period is too short and after jumping past it there is no possibility mail will get through. What is your server.tab 'NotifyTryPattern' along with xmail commandline, in particular the -Q options if any? I have -Qr (retries) set to 9 rather than default of 32 with Qi to spread retries out more than default. David - To unsubscribe from this list: send the line "unsubscribe xmail" in the body of a message to [EMAIL PROTECTED] For general help: send the line "help" in the body of a message to [EMAIL PROTECTED]
