Hi. > What is the nature of the client? If it is an MTA, then it must > return a message to sender; if it is an MUA, then don't count on > such clients to put a non-delivery notice in the sender's inbox. >
Yes, it is a MUA. Several MUAs actually: a Rainloop webmail client, a CLAWS mail client etc. All report that they failed to queue the message, which is exactly what I wanted to happen. Is there a trigger for postfix to send a custom failure notice email to the sender when this happens? Alternatively, I could do it myself from the milter's code i.e. call the sendmail program to do the job. Actually, this can make things as flexible as needed. Thank you, Stavros
