@tychi I did a variation of this using a python-based milter. The format is alias.folder-domain@virtualhost. The milter looks for 'domain' somewhere in the headers, scored according to just what kind of header it finds it in. By default the milter does not flag, but i can set the score threshold and action (flag, reject, drop) for each domain tag the system sees using a customized postfixadmin page (sql for the backend). Most of the time I dont need to set a threshold, but every once and a while someone gets pwned and then I can turn the feature on with a couple clicks (or just ban the tag entirely!)

@brunoph well, that is odd, maybe the bevel is progressive? I mean it could use filters over the receptors, but 6db loss at a minimum unless this is a short range cwdm. It's been years since I was involved in the design of these sorts of things, but there are two schools: maximize recovery margin, or throw laser diode power at it, mabe the economics of the latter prevail?

@kwf think of it on the rx-end as a prism, where the diffraction index is engineered to split the wavelengths in such a say to align with the specific photo diode. On the tx-side, it's a simple combiner with tuned lasers repesenting each channel

@rogersherman I tend to not trust polls at all, because realistically, who tends to respond to random phone calls nowadays?