The default exim email attachment size is 50MB, but usually in hosting companies, they offered only 10MB size for email attachment to reduce the server load. If you are a root user you may modify the email attachment size according to your needs.
1) How to check default email attachment size on exim mail server ?
Use the below command to checkout the exim default email attachment size.
root@server10001 [~]# exim -bP | grep message_size_limit message_size_limit = 50M
2) How to Increase the email attachment size in exim ?
Add the below line to your exim.conf file to increase the email attachment size from 50MB to 100MB
root@server10001 [~]# nano /etc/exim.conf GNU nano 2.0.9 File: /etc/exim.conf acl_smtp_connect = acl_smtp_connect daemon_smtp_ports = 25 : 465 : 587 tls_on_connect_ports = 465 message_size_limit=100MB queue_only_load = 24 deliver_queue_load_max = 12 spamd_address = 127.0.0.1 783
3) Rechecking email attachment size in exim ?
The below output clearly shows, the email attachment size had been increased from 50MB to 100MB.
root@server10001 [~]# exim -bP | grep message_size_limit message_size_limit = 100M
You can set the email attachment size to server widely and not for particular domain or email id.