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[<address@concealed>]

Hello,

We are using the latest sympa (6.1.20). We followed the guide on
https://www.sympa.org/manual_6.1/message-handling#unsubscription_url.

However sympa keeps adding the URL as an attachment and does not include it in
the message when the message is send. Every subscription is 'only html' or
'mail'. The merge footer is enabled and we customized the footer according to
the above url.

footer_type = add a new MIME part
merge_feature = on

Did we forget something?

Thank you.