With wallace-0.9.0.4-1.17.el9.kolab_16.noarch installed, when sending a complex HTML emails I get the following error(s):

File "/usr/lib64/python3.9/smtplib.py", line 875, in sendmail
  msg = _fix_eols(msg).encode('ascii')

UnicodeEncodeError: 'ascii' codec can't encode character '\xa3' in position 4196: ordinal not in range(128)
2024-02-20 15:18:06,788 pykolab.wallace/modules ERROR [1351] tmpft6gk4g5 smtplib - Unknown error occurred: UnicodeEncodeError('ascii', ... )
Traceback (most recent call last):

File "/usr/lib/python3.9/site-packages/wallace/modules.py", line 166, in _sendmail
  _response = smtp.sendmail(sender, recipients, msg)
File "/usr/lib64/python3.9/smtplib.py", line 875, in sendmail
  msg = _fix_eols(msg).encode('ascii')

UnicodeEncodeError: 'ascii' codec can't encode character '\xa3' in position 4196: ordinal not in range(128)