I have a Problem with sending Emails in Limesurvey. I installed Limesurvey on my own server(Apache) and use SMTP emails on another server to send out email invitation. Everytime I send a group of email (batch: 20 - 500 emails), people cannot access the survey page during this time(about 1-10min). After it finish sending the emails, people can go in again to do the survey.
Has anyone run into the same problem and already know the solution?
I appreciate any kind of help.