Email is case sensitive, how can I change this?

[soos]

Hi,

If a customer sends an email from Firstname.Lastname@Company.com it's not matched to firstname.lastname@company.com as it's described in our Active Directory, so our agents have to manually select the correct customer after the ticket has come in, is there a way to make email addresses always be lower case?

[jojo]

use a non case sensitive database

[soos]

OK, I don't think changing the data source or anything is going to be possible...

[soos]

Is there a way to have OTRS make the queries with LOWER() or something? Is there a config setting for this? I am using postgresql 9.3.