Starting getting spam from this domain.
Spamming engine owned by VerticalResponse.com
This is a mail service, so it may be used by spammers, or it may be used by legitimate businesses. I received mail from Salvation Army which is legitimate and was giving me details for upcoming volunteer activities. The link was listed as spam because users of WOT are not realizing that, like any email service, it will be used by both the bad and the good. Rate the actual spammer as spam not the part that comes after the @ sign.
Site is fine, Sigma the slr lens maker uses this domain to send out their emails.