Check first of all if your VPS provider has blocked port 25 and it is this which is preventing your system from sending out mail - and if so, see
Use Virtualmin’s webmail on port 20000 to check if the incoming mail has landed in the mailbox.
Check first of all if your VPS provider has blocked port 25 and it is this which is preventing your system from sending out mail - and if so, see
Use Virtualmin’s webmail on port 20000 to check if the incoming mail has landed in the mailbox.