Skip to content

SMTP2GO

SMTP2GO sends the email your app prepares and gives you an activity timeline for each message.

Visit SMTP2GO

What does the app need to send through SMTP2GO?

Verify a sending domain or an individual sender address. For a domain, add the records SMTP2GO supplies where you manage the domain. For a single address, complete the verification email for that address.

Connect the app using an SMTP user, the credential it uses to hand messages to the mail server. If the app uses an API instead, use its API key. Keep those credentials out of the browser and check that the app uses the verified From address.

Can you check the connection without delivering the receipt?

Enable Sandbox Mode on a dedicated test SMTP user or API key. SMTP2GO discards delivery attempts made with a sandboxed credential and still counts them toward the monthly allowance. Email Auditing can send a separate copy even in sandbox mode.

  1. Check which credential the test copy uses
    Open Tracking & Status and confirm the credential is marked Sandboxed. Check that the disposable app actually uses that credential. Disable Email Auditing and confirm any other notifications or webhooks stay within the test setup. If you cannot confirm the sender, credential or destinations, inspect the settings on paper.
  2. Look for a sandbox record
    Use one fictional receipt and an address on a reserved example domain. Check that the test appears in reporting. It can show the app handed the message to SMTP2GO. It does not test delivery to an inbox.

Where can you check a missing receipt?

Open Reports, then Activity, and look at the message timeline. A delivered entry means the receiving mail server accepted the message. A bounce is a delivery failure, and a rejection can happen before SMTP2GO attempts delivery.

Check whether the address appears in Suppressions before sending again. If the address is wrong, correct it. If it was suppressed for another reason, resolve that reason before attempting another send.

When does the free plan queue mail or stop accepting it?

Free allows 1,000 emails per month and 200 per day. The service can queue mail above the daily limit. Once the monthly limit is reached, further sends are rejected and do not wait for the reset.

Without a verified sender domain, the account is also limited to 25 emails per hour. Before moving, export the Activity and Suppressions records you need within the available report history. The Data Exports page supports formats such as CSV. Keep the app’s templates and separate sending settings too.