Our data indicates TietoEVRY supports DMARC compliance via SPF.
Contact TietoEVRY to ask about their DKIM capabilities.
All data we've noticed comes from '212.18.128.128/25', which means an addition of 'ip4:212.18.128.128/25' to your SPF record. In any case, be sure to contact TietoEVRY to verify this information.