[MM3-users] Re: adding personalized email header/content in mailman 3

On 10/17/24 12:47, Alex I wrote:

Thanks, but no luck. Trying option 1, added custom_header.py file:

The below is incomplete. Additions inline.

import logging

from mailman.interfaces.handler import IHandler from public import public from zope.interface import implementer

logger = logging.getLogger('mailman.smtp') # or some other @public

@implementer(IHandler) class AddCustomHeader: """A doc string is nice"

 name = 'custom-header'
 description = 'Some description'

 def process(self, mlist, message, msgdata):
     """Add a custom email header."""
     message['X-Custom-Header-1'] = 'ABCD'
     logger.info('Custom header added to message for list: %s', mlist.fqdn_listname)

to /opt/mailman/venv/lib/python3.9/site-packages/mailman/handlers/

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