[Mailman-Users] don't delivery messages

[David Elias Sanchez Vasquez]

Hello Folks

I have a mailing list from about 2000 suscribers, I use it as a newsletter.
I contracted a new host cause the one before could not send mails to many
destinataries at the same time. I did send  a message to the list on monday
and it did delivery fine. I tried to do the same yesterday and I did not. I
have 4 hotmail e-mails, one from yahoo and another one from another domaine
and I did not get the message I did sent. I also did not get back the mail I
did send (as is usual in any mailing list). However, 3 persons wrote me back
to tell me they have got the message. These persons have not free-mail
account. I don't know what's going wrong there? Is there a problem from
mailman? or from my provider?

Thanks

David.