Mails are not getting reflected in user group

[Allahbaksh Asadullah]

HI Noble,I am sending many mails to the sol-user group but they are not
getting displayed in mailing list. I am able to receive the emails from
user's group but not able to send any mail to user group.
I had sent a mail to the sol-owner too but there is no reply from it. Is
there any specific reason. Do you know what may be the problem.
Regards,
Allahbaksh