When user send a mail of 10 MB or more, all users using Webmail or MS Outlook as mail client.
will getting this error 552 5.3.4 Error: message file too big.
Read message_size_limit and mailbox_size_limit
Edit /etc/postfix/main.cf and add the following line
for 20MB in bytes as example:
for 20MB in bytes as example:
message_size_limit = 20971520
And also adjust mailbox_size_limit same as message_size_limit
mailbox_size_limit = 20971520
mailbox_size_limit = 20971520
then
postfix reload
