Once you got black-listed getting removed wasn't always an easy process no matter how quickly you tried fix whatever caused it.
I took a job in the year 2000, at a company with 3000 email users, listed by Spamhaus. First thing I did was close the open relay they were running. The listing was promptly removed, and the mail queue was back to normal within only a few days. I'm skeptical of your claim. I've never seen a confirmed case of Spamhaus aggression, but I've seen a lot that were disproven, and even more that sound like they were written by miscreants. Like the kind who would advocate DDoS attacks cough.
I took a job in the year 2000, at a company with 3000 email users, listed by Spamhaus. First thing I did was close the open relay they were running. The listing was promptly removed, and the mail queue was back to normal within only a few days. I'm skeptical of your claim. I've never seen a confirmed case of Spamhaus aggression, but I've seen a lot that were disproven, and even more that sound like they were written by miscreants. Like the kind who would advocate DDoS attacks cough.