Email with attachment file sent to mailing list cannot be received by receipent

As title, I encounter the problem when I send email to my mailing list with attachment file.

There are 2 cases,

1. attachment < 60KB
>> every one can receive the email.

2. attachment > 60KB
>> no one receive the email.


Does any one have the same experience? Any solution?

If you're not a systems administrator then you should be asking your hosting company this question.

if you are a systems administrator with shell access:

What's the output of the following command while logged in through the shell:

grep message_size_limit /etc/exim.conf

??

Also, this time as root:

grep maxlength /etc/vitual/example.com/majordomo/lists/listname.conf

where listname is the name of your list and example.com is the name of the domain.

In both these cases the number must be large enough for the attachment after it's encoded.