Set up your on-premise email server for SMTP relay through Google servers If your organization uses Microsoft Exchange or another SMTP service or server, you can set up the SMTP relay servi

Feedback Loop Control unauthenticated mail from your domain Monitor outgoing email with Postmaster Tools Gmail SMTP errors and codes

The IP address you registered in the Google Workspace SMTP relay service setting doesn’t match the domain of the account this email is being sent from. If you are trying to relay mail from a domain that …

The SMTP relay service authenticates messages with IP addresses, so devices and apps can send messages to anyone inside or outside of your organization. This option is the most secure.

Gmail SMTP errors and codes You might see the error messages and codes on this page when send email to Gmail accounts.The messages and codes can help you troubleshoot and resolve email …

SMTP relay spam policy in Gmail When you use the SMTP relay service to send Gmail through Google servers, Google monitors outgoing messages. If Google detects large amounts of spam being sent …

Route email for compliance (content and attachments) Compliance routing lets you specify how email is sent and delivered based on message content and attachments. You can also require that some …

Route outgoing SMTP relay messages through Google Set up third-party servers for email from Google IP addresses SMTP relay service error messages Google IP address ranges for outbound mail …

Si votre organisation utilise Microsoft Exchange ou un autre service ou serveur SMTP, vous pouvez configurer le service de relais SMTP pour router les messages sortants par le biais de Google. Vous …

smtp-relay.gmail.com 的 SMTP 交易上限為 100 名收件者。 如果超過此限制，就會收到錯誤訊息。 如要傳送郵件給更多收件者，請發起其他交易 (新的 SMTP 連線或 RSET 指令)。 系統會根據 SMTP 轉 …