Many organizations publicly list contact information to help consumers reach out for help when needed. This may be general contact information or a full public directory of staff. It seems obvious that having any kind of publicly available information will increase the liklihood that these accounts will receive spam or phishing emails. To help understand a bit of this, I set up a brand new domain with a very basic website and collected email using Amazon SES [1] for a couple of weeks. The website contained email addresses in a variety of formats:
Article Link: https://isc.sans.edu/diary/rss/30620