1. Office 365 SMTP Relay June 2013

5. Relay Method Send to rcpts in domain Relay to Internet via O365 Configuration Requirements Requires Authentication Bypasses Anti-spam Throttling Limits Licensing Requirements Direct SendYesNo (Direct delivery only) Port 25; TLS optional NoNo – suspicious emails may be filtered; custom SPF record recommended NoneEmail sender licensing not required Exchange Online Relay Yes Port 587 or 25; TLS required; dynamic IPs allowed Yes (If device does not support this option, you can use on-premises IIS SMTP relay) Yes – for mails destined to your Office 365 mailboxes 10,000 recipients per day Can use a standard or shared mailbox Exchange Online Protection Relay Yes Port 25; TLS optional; one or more static IP Addresses are required NoNo – suspicious emails may be filtered; custom SPF record recommended 10,000 (outbound) recipients per hour Requires Exchange Online Protection licenses for each sender; Office 365 mailboxes have this license