Here I really don't know where to start. It seems that I was always sending with encoded email addresses, but today I am sending the attachment with German รค in the file name, maybe it is that. I cannot know.
What could cause this? <<< 553-The recipient's mail server does not support E-mail <<< 553-messages with international Unicode E-mail addresses or <<< 553-E-mail messages in the international Unicode E-mail format. <<< 553 Unable to deliver Unicode E-mail to a non-Unicode mail server. Jean Take action in Free Software Foundation campaigns: https://www.fsf.org/campaigns In support of Richard M. Stallman https://stallmansupport.org/
