vt7.2 Outgoing Server Password database column is too small and prevents it from being decrypted
in vtiger_systems the server_password column is set to varchar(255) - however passwords are being encrypted now, and produce values that exceed this length, and so when trying to decrypt the password to send emails it will fail to send the emails.
Changing the column type of vtiger_systems.server_password to TEXT solves the issue.