quoted-string is nor parsed correctly in Mail Address

Summary

mail addresses parsed by the frontend are not RFC compliant. e.G. quoted-string are not parsed correctly

Steps to reproduce

Go to quoted-string https://foodsharing.de/?page=mailbox and enter the following addresses:

"Test Receiver"@example.com
"test;test2"@example.com
"test,test2"@example.com

These are valid (but uncommon) mail addresses and there might be more separators.

What is the current bug behavior?

Only the second part is added to the receivers list

Receiver"@example.com
test2"@example.com
test2"@example.com

What is the expected correct behavior?

All valid mail addresses should be added:

"Test Receiver"@example.com
"test;test2"@example.com
"test,test2"@example.com

Possible fixes

Fix the Mail address separator