I'm running a postfix mail server. One of it's components is
antivirus. For that I'm running clamav. I'd like to have a second
scanner as backup. Does anyone have any experience with bitdefender?
If not any other suggestions?
I have no experience with any particular antivirus, but looking at /etc/amavisd-new/conf.d/15-av_scanners.conf I can see that bitdefender is supported.
Since this is an amavis question you should get better luck asking in the amavis list instead.