I am not sure this is the proper place to ask this question, but I am sure someone will be able to help me :)
I have a Mac, which I use for daily working (emails, etc.). Recently, I received some weird return emails with strange content. After investigating a bit, I found out that I had some malware sending emails from my account and it even created new accounts in my domain (which is not hosted by me, but by a third-party) and also sent emails to people.
I am not sure if I started/infected the server too, but my account was being used to send spam and Avast found a few files in my computer that I had to delete. Now, everything seem like it is ok, but when I send some emails to my clients, I get them back saying this:
SMTP error from remote mail server after RCPT TO:<email@example.com>: 554 5.7.1 Service unavailable; Client host [SOME.IP.ADDRESS] blocked using b.barracudacentral.org; Client host blocked using Barracuda Reputation, see http://www.barracudanetworks.com/reputation/?r=1&ip=xx.xx.xx.xx
So it seems that I am in some blacklist/spamlist and some of my clients are not getting my emails. Apparently, my colleagues are not having the same problem. How can I get my email removed from those lists?