# Free email deliverability audit with E-Warmup

> Is your email landing in spam? Not getting the open rates you expect? In this free audit, we will look at your current sender setup and identify exactly what is hurting your inbox placement, whether that is domain reputation, warmup gaps, authentication issues, or sending patterns. What to expect: A focused, no-fluff conversation about your deliverability challenges Honest recommendations, whether or not E-Warmup is the right fit for you Clear next steps you can act on immediately after the call To make the most of the 30 minutes, come ready with your email provider (Gmail, Outlook, custom SMTP, etc.) and a rough idea of your daily sending volume. Everything else we will figure out together. Spots are limited each week, book the time that works for you and we will see you on the call. 🌐 Visit Website [in] Follow us on LinkedIn

- Host: E-Warmup
- Duration: 20, 30, 60 min
- Location: Google Meet
- Host time zone: Asia/Dubai
- Confirmation: Bookings are confirmed instantly.
- Booking page: https://cal.com/e-warmup/30min
- Event type id: 5617780

## Check availability

```http
GET https://api.cal.com/v2/slots?eventTypeId=5617780&start=YYYY-MM-DD&end=YYYY-MM-DD&timeZone=<IANA time zone>
cal-api-version: 2024-09-04
```

The response is `{"data":{"YYYY-MM-DD":[{"start":"<ISO 8601 with offset>"}]}}`; no API key is needed.

## Book

```http
POST https://api.cal.com/v2/bookings
cal-api-version: 2026-02-25
Content-Type: application/json

{
  "eventTypeId": 5617780,
  "start": "<UTC ISO 8601 start from the slots response>",
  "lengthInMinutes": 30,
  "attendee": {
    "name": "…",
    "email": "…",
    "timeZone": "<IANA time zone>"
  },
  "guests": [
    "guest@example.com"
  ],
  "bookingFieldsResponses": {
    "notes": "…"
  }
}
```

- Required fields: `name` (Your name), `email` (Email address)
- Optional fields: `notes` (Additional notes), `guests` (Add guests)
- `name` and `email` go in `attendee` and `guests` is a list of emails; every other field goes in `bookingFieldsResponses` under its name.
- `lengthInMinutes` picks one of 20, 30, 60; pass the same value to the slots request as `duration`.