This problem doesn't seem to be limited to free services or smaller companies. Mailing list stuff sent via Mailchimp often gets caught by my spam filter, and ma

This problem doesn't seem to be limited to free services or smaller companies. Mailing list stuff sent via Mailchimp often gets caught by my spam filter, and many Mailchimp IPs are on various blacklists used by spam filter software. Not really surprising when some companies surely are using services like Mailchimp to send spam - depending on your definition of spam.