When sending serial letters via email, sending to multiple email addresses (separated by ‘;’) does not work.

Apart from that, I get the following error if the individual email address in the underlying Calc file is formatted as a hyperlink. The specific error message is:

<class 'email.errors.HeaderWriteError'>: folded header contains newline: 'To: \n@#.com\n', traceback follows
  File "C:\Program Files\LibreOffice\program\mailmerge.py", line 335, in sendMailMessage
    self.server.sendmail(sendermail, truerecipients, msg.as_string())
  File "C:\Program Files\LibreOffice\program\python-core-3.10.19\lib\email\message.py", line 158, in as_string
    g.flatten(self, unixfrom=unixfrom)
  File "C:\Program Files\LibreOffice\program\python-core-3.10.19\lib\email\generator.py", line 118, in flatten
    self._write(msg)
  File "C:\Program Files\LibreOffice\program\python-core-3.10.19\lib\email\generator.py", line 201, in _write
    self._write_headers(msg)
  File "C:\Program Files\LibreOffice\program\python-core-3.10.19\lib\email\generator.py", line 235, in _write_headers
    raise HeaderWriteError(