can i send user tailored mails?

Yes, absolutely. The first step of email personification is sending the emails with addressing the recipient by name. This has become a common staple by 2020. The second thing is to segment and slice your email database to serve each tiny audience. If you can specifically target these audiences, you can create offers and address pain points as faced by these audience segments. So, get the right marketing database to start sending the right messages. Disclaimer - (i work B2Bdatapartners.com, a targeted database provider)

Yes, you can send specific mails. There are options to get done this requirement with some addons. Some of them are free but basics, another are pre-paid but more pro. antonio@brisdan.com

I have user specific mails that go out to my clients which are stored on the cloud as a "pdf" till such time as you require that email presentation for that particular group or user. When I require those formats and email presentations for those specific clients, then I gather the relevant files and simply import them. Besides the above, use custom merge tags for your audience, so that Mailchimp will identify the next time you attempt such mails and will therefore calibrate the mails as previously arranged for those specific users.