[Mailman-Users] Rejected or bounced messages.

[Joe]

Hi, everyone.

I have received several messages returned as rejected that were sent by my Mailman server as the 1st of the month subscription reminder.

These messages contain a technical explanation about the reason for their rejection I don't understand but it seems to me it has something to do with the way the messages are formatted. I received several of these messages from a total of nearly 350 members we host at this moment.

I won't post the messages and their entire content but just some of the reasons for their rejection. Here they are:


MESSAGE 1:


I'm sorry to have to inform you that your message could not
be delivered to one or more recipients. It's attached below.

For further assistance, please send mail to postmaster.

If you do so, please include this problem report. You can
delete your own text from the attached returned message.

                  The mail system

<mail at epdot.com>: host mx1.megamailservers.com[216.251.32.71] said: 550
   5.7.1 s01D0qcI004613 This message does not comply with required standards.
   (in reply to end of DATA command)


MESSAGE 2:


I'm sorry to have to inform you that your message could not
be delivered to one or more recipients. It's attached below.

For further assistance, please send mail to postmaster.

If you do so, please include this problem report. You can
delete your own text from the attached returned message.

                  The mail system

<mail at me.com>: host mx6.me.com.akadns.net[17.158.8.114] said: 550
   5.1.1 unknown or illegal alias: username at me.com (in reply to RCPT
   TO command)


MESSAGE 3:


I'm sorry to have to inform you that your message could not
be delivered to one or more recipients. It's attached below.

For further assistance, please send mail to postmaster.

If you do so, please include this problem report. You can
delete your own text from the attached returned message.

                  The mail system

<mail at cgocable.ca>: host mx2.cgocable.ca[216.221.81.40] said: 550 #5.1.0
   Address rejected. (in reply to RCPT TO command)


MESSAGE 4:


I'm sorry to have to inform you that your message could not
be delivered to one or more recipients. It's attached below.

For further assistance, please send mail to postmaster.

If you do so, please include this problem report. You can
delete your own text from the attached returned message.

                  The mail system

<mail at msn.com>: host mx2.hotmail.com[65.55.92.168] said: 550 Requested
   action not taken: mailbox unavailable (in reply to RCPT TO command)


Do you have any idea as to why these messages have been returned and what I need to do to resolve this issue ?

Thank you in advance for your help.

Joe.