Quill CRM
Bounce Handler article

SMTP2GO

Setup Instructions

Follow these steps to configure bounce handling for SMTP2GO:

Step 1: Get Your Webhook URL

  1. Go to QuillCRM → Settings → SMTP→ Bounce Handling
  2. Find the SMTP2GO section
  1. Copy the webhook URL provided

Your webhook URL will look like:> https://yoursite.com/wp-json/qc/v1/webhooks/bounce/smtp2go?key=your_security_key

Step 2: Configure SMTP2GO Dashboard

  1. Log in to your SMTP2GO Dashboard
  2. Navigate to Settings → Webhooks
  3. Click Add Webhook
  1. Configure the webhook:
FieldValue
Webhook URLPaste the webhook URL from Step 1
EventsSelect bounce-related events
FormatJSON
  1. Click Save Changes

Bounce Events Handled

SMTP2GO EventBounce TypeQuillCRM Action
hard_bounceHardMark as bounced immediately
soft_bounceSoftTrack; convert after threshold
bounceAuto-detectedAnalyzed by SMTP code (5xx = hard, 4xx = soft)
blockedHardMark as bounced
rejectHardMark as bounced

SMTP Code Detection

SMTP2GO sends bounce codes that QuillCRM automatically interprets:

Code RangeTypeExample Codes
5xxHard Bounce550, 551, 552, 553, 554
4xxSoft Bounce421, 422, 450, 451, 452