I've a Postfix / Dovecot server. It's running without issues. However, one specific account is facing issues continuesly.
Summarize of issues: - Webmail hangs (simple PHP opensource webmail) - can't add my account to most mobile clients (Outlook app on iPhone, MyMail etc) - Server connection issues on Outlook for PC and alot of strange errors (can't move items, directories etc)
I think, the reason is the size (18GB) of the mailbox. However, the server CPU and RAM looks okay.
My question: Is a Maildir of 18GB too large for IMAP? Or can I solve this with more server specifications or another software / tricks?