Handle "Undisclosed recipients" recipient group name in incoming emails

Description

If there are only BCC addresses in an email; Gmail set the TO field to Undisclosed recipients:;

in this case, we try to make a customer account for this but will get an error cause of the invalid address.

Possible solution:
Check for a valid email format when parsing the recipients.

Environment

None

Preliminary Test Cases

On latest released Jira:
Send email with only bcc from google -> no error

Assignee

Patrick Bakos

Reporter

Levente Réti

Labels

Access to limited visibility issues

None

Product platform

None

Module Dependency

None

Ready for Development

Specification is ready, linked in issue, reviewed by Quality
Issue summary and description are phrased clearly, ready for release notes

Story Points

3

Feature Testing Estimate

1

Components

Sprint

Fix versions

Priority

Major
Configure