Hello Martin,
my apologies but I was not able to understand what you would like to achieve, could you please provide some additional details?
Are you referring to the Contact Form object?

I would like to provide a drop down list in my email form in which the customer can select his postcode from the list; however, there are hundreds of postcodes in Austria, so I am looking for a way to import these postcodes into the drop down menu from an Excel file so that I do not have to enter them all manually

Hello Martin,
thank you for the clarification, unfortunately this function is not available.
Perhaps another user has implemented something similar through custom code and can provide insight on this.
I remain available.

(de)

Bei über 2000 Postleitzahlen in Österreich wäre eine Dropdown-Liste für Kunden viel zu umständlich, daher wäre es besser, einen Link zur Postleitzahlenliste bereitzustellen, damit Kunden einfacher nach der richtigen Postleitzahl suchen und diese kopieren können, siehe Postleitzahlenliste im Link unten

(en)

With over 2000 postal codes in Austria, a drop-down list would be far too cumbersome for customers, so it would be better to provide a link with the postal code list, which customers can more easily search for the correct postal code and copy that postal code, see postal code list

>> https://edm.gv.at/edm_portal/redaList.do

Danke!

PS: Es wären nur die PLZ von Wien, NÖ, BGLD;

ciao, ... ... here you will find an idea of ​​mine to condition the shipping costs relative to the CAP declared in the form:

https://helpcenter.websitex5.com/ru/post/269075
.

ciao

.

Grazie