Can LimeSurvey send invitation emails after a pre-defined delay?

Let's suppose that I sell cows. After selling one I write the customer's email address to LimeSurvey. The system should wait for a week, and then send a invitation for a questionnaire about the quality of milk; and then after a month send another invititation asking if the customer has already made some cheese; etc. etc.

This is not a built-in feature but may be accomplished with a cron job. Search the forums for "cron".

Thanks for your response. I downloaded sendMailCron and installed it. Then I made a test survey, two demo users, manually sent an invitation for one of them, got the email invitation, answered the survey, and everything seems to be OK. Howerver, after

I got


So there is something I did wrong. Any ideas what to check? The www-page is not very explicit.

Uh, my bad, kind of. I used the same email address for my two demo users. With another address everything works.