Alexander Adolf <alexander.adolf@condition-alpha.com> writes:

> Alexander Adolf <alexander.adolf@condition-alpha.com> writes:
>
>> [...]
>> +(defcustom message-email-recipient-header-regexp
>> +  "^\\([^ :]*-\\)?\\(To\\|B?Cc\\|From\\|Reply-to\\|Mail-Followup-To\\|Mail-Copies-To\\):.*? *\\([^,;]*\\)"
>> +  "Regexp matching headers that list email addresses."
>>    :group 'message
>>    :type 'regexp)
>> [...]
>
> The regular expression should have ended with the colon (':'), that is
>
>       "^\\([^ :]*-\\)?\\(To\\|B?Cc\\|From\\|Reply-to\\|Mail-Followup-To\\|Mail-Copies-To\\):"
>
> Apologies for the slip. My bad!

Updated patch: