- Plesk mail server: when using mail client subdirectory "sent mail" is not created, already sent mail is placed to "outgoing mail" directory.
- When using a mail client with other mailboxes, for example, firstname.lastname@example.org subdirectory "sent mail" (or "sent") created and already sent mail is normally put in "sent mail" directory.
- Switching IMAP server from Dovecot to Courier (and vice versa) using Plesk UI does not resolve the issue.
Mailbox is corrupted.
Note: If you do not have SSH access contact server administrator or service provider.
Note: Since RFC for IMAP protocol does not specify a naming convention for folders like "Sent", it is possible that different mail clients would create different folders to save messages in there. Folders like "Sent", "Drafts", "Junk" and "Trash" are created automatically when the client logins using Roundcube, or Horde. Mail client software should use these folders if they exist at the account creation time. In case they did not, it is recommended to create a rule to move sent messages to the specific folder.
Create a backup of mailbox contents and recreate mailbox in Plesk:
- Connect to the server via SSH.
Create backup directory and copy all contents of mailbox to backup directory:
# mkdir /root/backup-mailbox/
# cp -rp /var/qmail/mailnames/example.com/johndoe/* /root/backup-mailbox/
Login into Plesk UI and remove mailbox via Plesk UI: Domains > example.com > Email addresses > check mailbox "email@example.com" and click Remove.
Using SSH command ensure that mailbox's folder is actually removed:
# rm -f /var/qmail/mailnames/example.com/johndoe
Create new mailbox with same name "firstname.lastname@example.org" via Plesk UI: Domains > canalplast.it > Email addresses > click Create mailbox and type "email@example.com".
Copy messages from backup directory to directory of mailbox "firstname.lastname@example.org":
# cp -rp /root/backup-mailbox/* /var/qmail/mailnames/example.com/johndoe/
Log into webmail interace with username "email@example.com" and send test email to intialize "send" folder.