[qmailtoaster] Out of memory error sending from Squirrelmail on CentOS6

System is a CentOS6 x64 running the testing qmailtoaster (DK disabled) (in a VM on Citrix XenServer 6.2) This toaster has been up and running for a few weeks now and, to the best of my knowledge (I almost never use the webmail interface), outgoing mail from Squirrelmail WAS working fine up until

Re: [qmailtoaster] Out of memory error sending from Squirrelmail on CentOS6

I'm not sure whether this is related or not, however... Squirrelmail will not accept usern...@domain.com plus password for login - it will only accept username plus password: ERROR: ERROR: Connection dropped by IMAP server. Query: LOGOUT Connecting with a mail client, either format