| Format/Software | Dovecot | Exim | Postfix | PINE | mutt | procmail | maildrop |
|---|---|---|---|---|---|---|---|
| mbox | Yes | Yes | Yes | Yes | Yes | Yes | Yes |
| mbx | No | Yes | No | Yes | No | No | No |
| maildir | Yes | Yes | Yes | No | Yes | Yes (3.22) | Yes |
| mailstore | No | Yes | No | No | No | No | No |
| dbox | Yes | No | No | No | No | No | No |
| MH | No | No | No | Yes | Yes | Yes | No |