---
id: object/codeunit/4619
type: object
title: Codeunit 4619 "NTLM SMTP Auth"
summary: Codeunit 4619 "NTLM SMTP Auth" in Email - SMTP API (System.Email). 1 public procedures. Introduced in BC29, still in BC30.
tier: official
language: en
tags:
  - codeunit
  - email - smtp api
versions:
  introduced: "29"
  last_changed: null
  deprecated: null
review:
  state: derived
  by: null
  at: null
  flags: []
generated:
  at: "2026-10-11T00:31:51.816Z"
  pipeline: 0.2.0
  prompts: {}
  input_hash: 213726f094065ad52b6753f416cf9c0924064c1f3823ca37754d972e21cce325
evidence:
  - kind: code
    url: https://github.com/microsoft/BCApps/blob/ea08af5ef2d6a9b5c5af4a029288abbe2c883220/src/Apps/W1/Email%20-%20SMTP%20API/app/src/Authentication/NTLMSMTPAuth.Codeunit.al
    title: src/Apps/W1/Email - SMTP API/app/src/Authentication/NTLMSMTPAuth.Codeunit.al (releases/29.x)
    date: null
    commit: ea08af5ef2d6a9b5c5af4a029288abbe2c883220
    t: null
    quote: null
links:
  learn: []
  objects: []
  features: []
  topics: []
  localizations: []
  videos: []
  posts: []
  guidelines: []
object_type: codeunit
object_id: 4619
name: NTLM SMTP Auth
namespace: System.Email
app: Email - SMTP API
extends: null
first_version: "29"
last_version: "30"
present_in:
  - "29"
  - "30"
changed_in: []
source_major: "29"
obsolete: null
countries: []
ms_search_form_ids: []
counts:
  fields: 0
  procedures: 1
  events: 0
  subscribers: 0
relations:
  out: 0
  referenced_by: 0
  pages: 0
  extended_by: 0
  event_subscribers: 0
  calls: 1
  called_by: 0
  implements: 1
---

# Codeunit 4619 "NTLM SMTP Auth"

> Codeunit 4619 "NTLM SMTP Auth" in Email - SMTP API (System.Email). 1 public procedures. Introduced in BC29, still in BC30.

Email - SMTP API · System.Email · BC29-30 · [source at ea08af5e](https://github.com/microsoft/BCApps/blob/ea08af5ef2d6a9b5c5af4a029288abbe2c883220/src/Apps/W1/Email%20-%20SMTP%20API/app/src/Authentication/NTLMSMTPAuth.Codeunit.al) · facts from BC29

## Properties

| Property | Value |
|---|---|
| Access | Internal |

## Procedures

- `Authenticate(SmtpClient: DotNet SmtpClient; var SMTPAuthentication: Codeunit "SMTP Authentication")`

## Calls

From the extracted call graph of BC29 (graphify-al on the snapshot checkout): calls whose target is known from a declared type or an `Object::"Name"` argument. Interface dispatch and calls through events are not counted, so the list is not complete.

- [Codeunit 4620 "SMTP Authentication"](../codeunit/4620.md) (2 calls: `Authenticate → GetPassword`, `Authenticate → GetUserName`)

## Implements

- [Interface "SMTP Auth"](../interface/smtp-auth.md)

## Across versions

- Present in: BC29-30
- Changed (declaration) in: none

Source: AL metadata extracted from the code (names, ids, signatures, properties); no code bodies (D10).

## Ask your agent

Procedure bodies are not stored here (D10). The call sections above are our own, per object, from the BC29 call graph. For a procedure body or the calls of one procedure, ask bc-code-atlas (external, by Stefan Maron, MIT; default corpus w1-28), which the bc-observatory plugin connects: `bcatlas_resolve_node(object_type: "codeunit", object_name: "NTLM SMTP Auth")`, then `bcatlas_get_procedure_body` or `bcatlas_get_neighbors` on the returned id.