Please make sure the list is Cc'ed (use Reply to All).

Borja Riesgo Juan writes:

Sorry stpehen. Than you but i don´t find *personalize* messages ni full personalization in my adminsitrative interface. i have this option "Header added to mail sent to regular list members" bu ti think it´s not the correct one.

No, that's not the right one.

I guess your system is not set up to permit personalized delivery. To enable it, you need to add

OWNERS_CAN_ENABLE_PERSONALIZATION = Yes

to the mm_cfg.py configuration file. Unfortunately, it sounds like you are using a cheap shared host for your domain, and it's probable that you don't have access to that file and your ISP won't make this change for you (it can put a lot of pressure on their mail server).

In that case, there's really nothing you can do to get Mailman to send mail that appears to be addressed "To: One Recipient" -- it's just against your ISP's rules. But try asking your ISP.

If not, the best you can do is use Mailman as a mailing list manager, and hope people don't mind.