Webmasters Stack Exchange is a question and answer site for pro webmasters. Join them; it only takes a minute:

Sign up
Here's how it works:
  1. Anybody can ask a question
  2. Anybody can answer
  3. The best answers are voted up and rise to the top

I'm using MailChimp, and I sent out a test newsletter to myself, and the title had ADV: added to the beginning of my title. I'm not sure if MailChimp did that on its own, or if it was outlook exchange. But I have seen other emails that have ADV: at the start of the title

What does it mean? and is there a way to stop MailChimp from adding it?

share|improve this question
Did you check if ADV was added to all emails by checking other email inboxes at Gmail and such? Have you tried running it on a different server? – John Conde Aug 7 '13 at 20:31
ADVertisement which means it will end up in GMail's Promotional tab, Outlook's Junk folder. – Fiasco Labs Nov 6 '13 at 0:13

Some states require it (Colorado), but it doesn't look like it's coming from mailchimp based on a Google search. If you're using a filtering service on your inbound messages like an antivirus/antispam firewall or an antispam gateway then they may be prepending the header when something matches their filters. It could be Bayesian or a rule specifically for all e-mails from mailchimp. Some antispam filters will actually look for unsubscribe lines in the messages (although these aren't always technically spam).

share|improve this answer

Your Answer


By posting your answer, you agree to the privacy policy and terms of service.

Not the answer you're looking for? Browse other questions tagged or ask your own question.