[Mailman-Users] pending request email unreadable

[Guillaume Chartrand]

Hi, I receive some pending request for a list who I'm the administrator and moderator and in the message body on the web interface is unreadable, it's just something like that
Sm9saSBib25uZXQgZGUgbGFpbmUgbGFpc3PDqSBwb3VyIG1vcnQgYXUgZGVybmllciBJbnRlckNB
Q0Ugw6AgQ2hpY291dGltaS4gSWwgZXN0IGJydW4gZXQgYmVpZ2UgYXZlYyBkZXMgb3JlaWxsZXMg
ZXQgZGVzIGxhbmnDqHJlcyBwb3VyIGF0dGFjaGVyIGF1IGNvdeKApi4NClF1ZWxxdeKAmXVuIGEg
Z2Vsw6kgZGVzIG9yZWlsbGVzIGxlIHdlZWstZW5kIGRlcm5pZXI/Pz8/DQoNCk1hbm9uIExhcGll
cnJlDQpNYW5vbiBMYXBpZXJyZQ0KYWdlbnRlIGRlIG1pbGlldSBldCByZXNwb25zYWJsZSBkZSBs
J2Vudmlyb25uZW1lbnQNCmNvbnNlaWwgZGUgdmllIMOpdHVkaWFudGUNCkPDqWdlcCBkZSBjaGlj

But if I approved this message it's send in readable format for all the user list. Why this can happens? I can't verify if it's appropriate content and I need to approve it to see it, it's not useful.

I use mailman 2.1.6 on red hat 4 server with sendmail server and ASSP server to block spam. Some test message appears fine and some other is unreadable.

----------------------------
Guillaume Chartrand
Technicien informatique
Cégep régional de Lanaudière
Centre administratif, Repentigny
(450) 470-0911 poste 7218