If you've switched ON a Regular Email survey campaign and the surveys are not being sent immediately (or at the expected time), please check the reasons below in order to troubleshoot this situation.
There might be a 1-hour delay. The campaign starts working about once every hour when it starts pulling the list of contacts that should receive the survey and sends the survey based on the schedule. Depending on when exactly in between this hour you have switched the campaign ON, it may take from a few minutes to up to 1 hour for the surveys to be sent out.
Contacts do not match the schedule. Each regular email campaign follows its own schedule, so the "First survey" rule targets the contacts that this campaign has never surveyed. A survey sent by one of your other campaigns no longer stops a contact from qualifying here. If this same campaign has already surveyed a contact and the recurring schedule is switched OFF, then that contact will not receive another survey in this campaign, and you can send the survey manually instead.
The throttle is holding the contact back. On the campaign's Schedule step, check the Throttle the survey to avoid over-surveying contacts option. When it is switched ON, a contact who was surveyed within the configured number of days is skipped until that window passes. Set to Any campaign, it counts surveys from all of your campaigns, so a survey sent by a different campaign can delay this one. This is a delay and not an exclusion: the contact becomes eligible again on their own once the window ends.
The contact no longer matches the campaign's time frame or day of the week. You can check these settings in the campaign's Schedule section. Also, please make sure that the configured time frame gives the campaign at least 2 hours to ensure that surveys will be sent on the same date that the campaign was switched ON.
If none of the options listed above answer your question, please get in touch with our support team and we will be glad to assist you.