Linux / UNIX find out size of email account or mailbox

To find out the size of an email account or mailbox on a Linux or Unix-like system, you can use the du command to display the size of the mailbox file or directory.

For example, if your email account uses the Maildir format, you can use the du command to display the size of the Maildir directory for your email account. For example:

du -sh /path/to/Maildir

Replace /path/to/Maildir with the path to your Maildir directory. This will display the size of the Maildir directory in human-readable format (e.g., "10M" for 10 megabytes).

If your email account uses the mbox format, you can use the du command to display the size of the mailbox file for your email account. For example:

du -sh /path/to/mailbox.mbox

Replace /path/to/mailbox.mbox with the path to your mailbox file. This will display the size of the mailbox file in human-readable format (e.g., "10M" for 10 megabytes).

You can also use the mailq command to display the size of the queue of outgoing mail for your system. For example:

mailq | grep total

This will display the total size of the outgoing mail queue.

You can find more information about the du and mailq commands and their options in the du and mailq documentation or by running the du --help and mailq --help commands.