I just improved a script from Mark Sechell’s answer. As We can see, that script can parse the mbox file based on the amount of email per chunk. This improved script can parse the mbox file based on the defined-maximum-size for each chunk.
So, if you have size limitation in uploading or importing the mbox file, you can try the script below to split the mbox file into chunks with specified size*.
Save the script below to a text file, e.g. mboxsplit.txt, in the directory that contains the mbox file (e.g. named mbox):
BEGIN{chunk=0;filesize=0;}
/^From /{
if(filesize>=40000000){#file size per chunk in byte
close("chunk_" chunk ".txt");
filesize=0;
chunk++;
}
}
{filesize+=length()}
{print > ("chunk_" chunk ".txt")}
And then run/type this line in that directory (contains the mboxsplit.txt and the mbox file):
awk -f mboxsplit.txt mbox
Refrensi: https://stackoverflow.com/questions/28110536/how-to-split-an-mbox-file-into-n-mb-big-chunks-using-the-terminal