I'm wondering how you would go about pausing an ip address to a remote domain based on a string received. I received an error code from yahoo and my IP was blocked for a long time. I was told it was because it I didn't respect their deferral code and I needed to pause sending email to them if I ever received one of a handful of deferral codes again. However, I have no clue how to do this.
I'm using Exim4, but I wouldn't be opposed to using something else like qmail or postfix if Exim4 can't do this.
Thank You, William