Route your Amplemarket sequences through your own SMTP server for full control over email infrastructure and deliverability

Amplemarket supports custom SMTP connections, letting you send sequences through your own mail server instead of relying on standard email provider infrastructure. This is particularly useful for high-volume outreach where sending large numbers of emails through a standard inbox could trigger spam flags or hit provider-imposed sending limits.

You can connect any SMTP-compatible provider, including SendGrid, SendinBlue, Mailgun, or your own mail server, by entering your SMTP credentials in Amplemarket's mailbox settings. For Microsoft Outlook users specifically, Amplemarket also offers a free custom SMTP relay powered by its own SendGrid instance, which bypasses Microsoft's sending infrastructure and its associated restrictions.

Configuration is straightforward: select a mailbox, open the SMTP settings, and enter your host, port, username, and password. Once connected, all outbound email from that mailbox routes through your SMTP server while Amplemarket handles sequencing, scheduling, and tracking as usual.

• Send through any SMTP provider Connect SendGrid, SendinBlue, Mailgun, Amazon SES, Postmark, or any SMTP-compatible server. Amplemarket sends your sequence emails through your chosen infrastructure.
• Handle high-volume campaigns Custom SMTP servers are built for bulk sending. Route large campaigns through dedicated infrastructure to avoid the sending limits and spam triggers that come with standard email inboxes.
• Use Amplemarket's free SendGrid relay Amplemarket provides a free custom SMTP option through its own SendGrid instance. This is especially useful for Microsoft/Outlook users who face sending restrictions on Microsoft's infrastructure.
• Maintain full deliverability control Manage your own SPF, DKIM, and DMARC records, IP reputation, and sending domain configuration. Your deliverability is in your hands, not your email provider's.
• Per-mailbox configuration Configure custom SMTP on individual mailboxes. Some mailboxes can use standard sending while others route through SMTP, giving you flexibility across your team.

1. Choose an SMTP provider Sign up with an SMTP service like SendGrid, SendinBlue, Mailgun, or any provider that suits your needs. They'll provide you with SMTP credentials (host, port, username, password).
2. Enter SMTP credentials in Amplemarket Go to Account Settings, then Mailboxes. Find the mailbox you want to configure, click the three dots menu, and select "Configure Custom SMTP." Enter your SMTP host, port, username, and password.
3. Test the connection Click the "Test SMTP connection" button to verify everything is configured correctly. If the test passes, your mailbox is ready to send through your SMTP server.
4. Send sequences Once configured, all outbound email from that mailbox routes through your SMTP server. Amplemarket continues to handle sequence logic, scheduling, reply detection, and analytics. Only the sending infrastructure changes.

Scale outreach beyond provider limits

Your team sends 500+ emails per day per rep, and Gmail or Outlook is throttling delivery or flagging messages. Routing through a dedicated SendGrid or Mailgun instance lets you scale volume without hitting provider-imposed sending caps, while maintaining your sender reputation on infrastructure designed for bulk email.

Bypass Microsoft Outlook sending restrictions

Your company uses Microsoft 365 for email, but Outlook's sending limits are blocking your outbound sequences. Amplemarket's free SendGrid relay routes your sequence emails through SendGrid instead of Microsoft's infrastructure, removing the bottleneck while keeping your Outlook mailbox as the reply-to address.

Centralize email infrastructure for compliance

Your IT team requires all outbound email to route through a company-managed SMTP server for logging, compliance, and DLP purposes. Custom SMTP lets Amplemarket's sequences respect that requirement. All outbound mail flows through your controlled infrastructure while reps still work within Amplemarket's sequencing tools.