Error when the attachement of an email send to the mail box of configured on the messageboard portlet contains accents

• Type: Bug
• Status: Closed
• Resolution: Fixed
• Affects Version/s: 6.2.X EE, 7.0.0 DXP SP2, Master
• Fix Version/s: 6.2.X EE, 7.0.0 DXP SP2, 7.0.0 DXP FP13, 7.0.0 DXP SP3, 7.0.3 CE GA4, 7.1.X, Master
• Component/s: Message Boards, Subscription Manager, ~ [Archived] Collaboration
• Labels:
  • 62-ee-sp19
  • liferay-digital-enterprise-70-sp3
  • liferay-fixpack-de-13-7010
  • liferay-fixpack-portal-140-6210
• Branch Version/s:
  7.0.x, 6.2.x
• Backported to Branch:
  Committed
• Story Points: 1.25
• Fix Priority: 3
• Git Pull Request: https://github.com/brianchandotcom/liferay-portal/pull/47188

When the attachement of an email that has been sent to the mail box configured on the messageboard portlet contains accents, a FileNameException is thrown.

Steps to reproduce:
1.- Set pop.server.notifications.enabled=true on portal-ext.properties
2.- Start a Liferay bundle and add the messageBoard portlet to a page.
3.- Add a new category on the messageBoard portlet.
4.- Configure the mailing list for this category
5.- Set the email configuration on control panel > configuration > server administration > mail
6.- Create a new user with a real email
7.- send an email from the email account of the user created on step 6 to the email setted on step 4: this email must contain an attachement which name has an accent.
8.- Wait until the email is imported by the portal

Expected behavior: the attachment is well imported
Current Behavior: FileNameException is thrown, so neither the email body, nor the attachement are imported.