How to set this up?

Mautic 3
My Mautic version is: 3
My PHP version is: 7.3

Your problem
My problem is: WHat exactly should I do to separate sign up users from several of my websites. I will have few mautic signup forms on several sites. And I dont want to mix contacts inside mautic. I know mautic does not support campaigns so that is why I am asking this.

Also I need to import users from interspire email marketer, because the support is awful, it takes them to answer 1 week or evern more and never fix the problems.

I have a field for one website that has a dropdown. So it is like
Born on:
1st, 10th, 19th of the month
2nd, 11th, 20th of the month
3rd, 12th, 21th of the month

Will I be able to import this data for like 15000 users I have already from interspire marketer?

These errors are showing in the log:

Steps I have tried to fix the problem:

I’d set up Multiple Mautic installations. I.e. One Mautic per site you run if you want to keep things separate.

Importing is certainly possible. Use background importing if you’re doing large amounts of data.