Guernsey's tourism unit has investigated its email marketing because of concerns over the use of spam or unsolicited emails.
International anti-spam company Spamhaus approached the States last week after it found a VisitGuernsey email in a "spam trap" address.
Repeated attempts to contact the media agency working for VisitGuernsey have been unsuccessful.
VisitGuernsey says it is satisfied no laws have been broken.
A spokesman for the Commerce and Employment Department, which oversees tourism advertising, said it was happy the mailing "has not breeched any anti-spam legislation" and was "fully compliant" with Information Commissioner's Office guidelines.
Richard Cox, chief information officer for Spamhaus, said they contacted responsible organisations to point out the spam "to give them a chance to make matters right so we don't have to add them to any of our lists".
The company's lists are used by email providers to filter emails into spam or junk mail folders.
Emma Martins, Guernsey's data protection commissioner, said in the case of marketing sent to personal emails those who own the email will "have to have consented or opted in".
She said: "I would expect a reputable organisation such as VisitGuernsey to enter contracts that ensure that their contracted providers ensure the lists [of email addresses] they provide, they obtain and they purchase have the consent issue flushed out."