[Dovecot] dovecot cannot access a specific folder

Hello list,

Has someone stumbled upon this before ?

-- Jan 09 11:25:01 IMAP(postmaster@webmail.domain.gr): Error: stat(/var/MailRoot/domains/webmail.domain.gr/postmaster/Maildir/tmp) failed: Permission denied (euid=501(vmail) egid=502(vmail) missing +x perm: /var/MailRoot)

"/var/MailRoot" is the root path/folder for XMail. An smtp/pop3 server.

Should I go ahead and chmod the folder or should I try to find a more delicate solution to this ?

Any help would be greatly appreciated,

Regards,

spyros