Is it possible to apply filters for incoming emails?
Let's say, if an email is coming from firstname.lastname@example.org with infos in subject I want it to go to the infos1 label.
I don't want the filter to be based only on the sender, but on the subject too.
Yes. Gmail filters can include multiple components and only flag/forward/tag emails that match the multiple requirements.
Some examples from my own filters:
from:(email@example.com or firstname.lastname@example.org) subject:("Delivery Status Notification")
to:(+special) thing is an interesting filter. Say your user is
email@example.com. You can give the email address
firstname.lastname@example.org as your email address to someone, and all of your emails from that person (as long as they use the
+special in the email address) will be filtered on that.