diff --git a/example.env b/example.env
index 7c70f4e..8fc68b3 100644
--- a/example.env
+++ b/example.env
@@ -39,3 +39,6 @@ IS_CROSS_SITE=false
 # e.g. /api
 
 SIMPLE_COMMENT_API_URL=/.netlify/functions
+
+# NOTIFICATION_SERVICE_API_KEY is optional, but if there is a notification service, this is the associated API key
+# NOTIFICATION_SERVICE_API_KEY=some-optional-api-key
diff --git a/package.json b/package.json
index c88cc19..e1b3532 100644
--- a/package.json
+++ b/package.json
@@ -61,7 +61,7 @@
     "http-server": "^14.1.0",
     "jest": "29.6.1",
     "jest-environment-jsdom": "^29.6.1",
-    "jest-environment-node": "^29.6.1",
+    "jest-environment-node": "^29.7.0",
     "jsonwebtoken": "^9.0.1",
     "merge": "^2.1.1",
     "mini-css-extract-plugin": "^2.7.6",
diff --git a/src/lib/AbstractNotificationService.ts b/src/lib/AbstractNotificationService.ts
new file mode 100644
index 0000000..314aaf6
--- /dev/null
+++ b/src/lib/AbstractNotificationService.ts
@@ -0,0 +1,10 @@
+import { Success, Error } from "./simple-comment-types"
+
+export abstract class AbstractNotificationService {
+  /**
+   * Send notification to moderators
+   */
+  abstract notifyModerators: (
+    message: string
+  ) => Promise<Success | Error> | void
+}
diff --git a/src/lib/MongodbService.ts b/src/lib/MongodbService.ts
index c1eab91..d70eb78 100644
--- a/src/lib/MongodbService.ts
+++ b/src/lib/MongodbService.ts
@@ -76,6 +76,7 @@ import {
 import { comparePassword, getAuthToken, hashPassword } from "./crypt"
 import * as jwt from "jsonwebtoken"
 import { isGuestId, isValidResult } from "./shared-utilities"
+import { AbstractNotificationService } from "./AbstractNotificationService"
 
 if (process.env.SIMPLE_COMMENT_MODERATOR_PASSWORD === undefined)
   throw "SIMPLE_COMMENT_MODERATOR_PASSWORD is not set in environmental variables"
@@ -97,6 +98,7 @@ export class MongodbService extends AbstractDbService {
   private _db: Db
   readonly _connectionString: string
   readonly _dbName: string
+  readonly _notificationService?: AbstractNotificationService
 
   getClient = async () => {
     if (this._client) {
@@ -114,10 +116,15 @@ export class MongodbService extends AbstractDbService {
     return this._db
   }
 
-  constructor(connectionString: string, dbName: string) {
+  constructor(
+    connectionString: string,
+    dbName: string,
+    notificationService?: AbstractNotificationService
+  ) {
     super()
     this._connectionString = connectionString
     this._dbName = dbName
+    this._notificationService = notificationService
   }
 
   /**
@@ -599,6 +606,13 @@ export class MongodbService extends AbstractDbService {
           body: "Database insertion error",
         }
       }
+
+      if (this._notificationService) {
+        this._notificationService.notifyModerators(
+          `New comment posted by ${authUser.name} (${authUser.email})`
+        )
+      }
+
       return {
         statusCode: 201,
         body: { ...insertComment, user: adminSafeUser },
diff --git a/src/lib/NoOpNotificationService.ts b/src/lib/NoOpNotificationService.ts
new file mode 100644
index 0000000..23f3a9a
--- /dev/null
+++ b/src/lib/NoOpNotificationService.ts
@@ -0,0 +1,7 @@
+import { AbstractNotificationService } from "./AbstractNotificationService"
+
+export class NoOpNotificationService extends AbstractNotificationService {
+  notifyModerators = (message: string): void => {
+    console.info(`NoOpNotificationService: ${message}`)
+  }
+}
diff --git a/src/lib/SendGridNotificationService.ts b/src/lib/SendGridNotificationService.ts
new file mode 100644
index 0000000..a3501ca
--- /dev/null
+++ b/src/lib/SendGridNotificationService.ts
@@ -0,0 +1,62 @@
+import { AbstractNotificationService } from "./AbstractNotificationService"
+import { Error, Success } from "./simple-comment-types"
+import { MailService } from "@sendgrid/mail"
+import { config as dotEnvConfig } from "dotenv"
+dotEnvConfig()
+
+const _sendGridApiKey = process.env.NOTIFICATION_SERVICE_API_KEY
+
+const _moderatorContactEmails = process.env
+  .SIMPLE_COMMENT_MODERATOR_CONTACT_EMAIL
+  ? process.env.SIMPLE_COMMENT_MODERATOR_CONTACT_EMAIL.split(",")
+  : undefined
+
+export class SendGridNotificationService extends AbstractNotificationService {
+  private readonly _mailService: MailService
+  private readonly _moderatorContactEmails: string[]
+  private readonly _sendGridApiKey: string
+
+  constructor(
+    mailService: MailService,
+    sendGridApiKey?: string,
+    moderatorContactEmails?: string[]
+  ) {
+    super()
+
+    const apiKey = sendGridApiKey ?? _sendGridApiKey
+    if (apiKey === undefined)
+      throw "NOTIFICATION_SERVICE_API_KEY is not set in environmental variables"
+    this._sendGridApiKey = apiKey
+
+    const emails = moderatorContactEmails ?? _moderatorContactEmails
+
+    if (emails === undefined || emails.length === 0)
+      throw `SIMPLE_COMMENT_MODERATOR_CONTACT_EMAIL is not set in environmental variables`
+
+    this._moderatorContactEmails = emails
+    mailService.setApiKey(this._sendGridApiKey)
+    this._mailService = mailService
+  }
+
+  notifyModerators = async (body: string): Promise<Error | Success> => {
+    const messages = this._moderatorContactEmails.map(email => ({
+      to: email,
+      from: "sender@email.com", // Sender's email address
+      subject: "Simple Comment Notification",
+      text: `${body}`,
+    }))
+
+    const sendPromises = messages.map(message =>
+      this._mailService.send(message)
+    )
+    const sendResults = await Promise.race(sendPromises)
+
+    if (sendResults[0]?.statusCode !== 202) {
+      const { statusCode, body } = sendResults[0]
+      const resultsBody = JSON.stringify(body)
+      return { statusCode, body: resultsBody }
+    } else {
+      return { statusCode: 202, body: "Emails sent successfully" }
+    }
+  }
+}
diff --git a/src/tests/backend/SendGridNotificationService.test.ts b/src/tests/backend/SendGridNotificationService.test.ts
new file mode 100644
index 0000000..c57a28c
--- /dev/null
+++ b/src/tests/backend/SendGridNotificationService.test.ts
@@ -0,0 +1,129 @@
+import { SendGridNotificationService } from "../../lib/SendGridNotificationService"
+import { ClientResponse, MailService } from "@sendgrid/mail"
+
+jest.mock("dotenv", () => ({
+  config: jest.fn(() => {
+    process.env.SIMPLE_COMMENT_MODERATOR_CONTACT_EMAIL =
+      "email1@example.com,email2@example.com,email3@example.com,email4@example.com,email5@example.com,email6@example.com,email7@example.com,email8@example.com,email9@example.com,email10@example.com"
+
+    process.env.NOTIFICATION_SERVICE_API_KEY = "SG.from.test.env"
+  }),
+}))
+
+describe("SendGridNotificationService", () => {
+  let sendGridNotificationService: SendGridNotificationService
+  let mailServiceMock: jest.Mocked<MailService>
+
+  const moderatorContactEmails = ["a1@example,com", "test2@example.com"]
+  const sendGridTestApiKey = "SG.test"
+
+  const originalEnv = process.env
+
+  beforeEach(() => {
+    jest.resetModules()
+    mailServiceMock = {
+      setApiKey: jest.fn(),
+      send: jest.fn(),
+    } as unknown as jest.Mocked<MailService>
+
+    sendGridNotificationService = new SendGridNotificationService(
+      mailServiceMock,
+      sendGridTestApiKey,
+      moderatorContactEmails
+    )
+  })
+
+  afterEach(() => {
+    process.env = originalEnv
+  })
+
+  it("should set API key", async () => {
+    expect(mailServiceMock.setApiKey).toHaveBeenCalledWith(sendGridTestApiKey)
+  })
+
+  it("should use environmental variable for API key", async () => {
+    new SendGridNotificationService(mailServiceMock)
+    expect(mailServiceMock.setApiKey).toHaveBeenCalledWith("SG.from.test.env")
+  })
+
+  it("should handle email sending failure", async () => {
+    const body = "Test message"
+    const mockErrorResponse: ClientResponse = {
+      statusCode: 500,
+      body: {},
+      headers: undefined,
+    }
+
+    mailServiceMock.send.mockResolvedValueOnce([mockErrorResponse, {}])
+
+    const result = await sendGridNotificationService.notifyModerators(body)
+
+    expect(mailServiceMock.setApiKey).toHaveBeenCalledWith(sendGridTestApiKey)
+    expect(mailServiceMock.send).toHaveBeenCalledTimes(
+      moderatorContactEmails.length
+    )
+    expect(result.statusCode).toEqual(mockErrorResponse.statusCode)
+  })
+
+  it("should throw given empty moderator contact emails", async () => {
+    expect(
+      () =>
+        new SendGridNotificationService(mailServiceMock, sendGridTestApiKey, [])
+    ).toThrowError(
+      "SIMPLE_COMMENT_MODERATOR_CONTACT_EMAIL is not set in environmental variables"
+    )
+  })
+
+  it("should throw given undefined moderator contact emails", async () => {
+    expect(
+      () =>
+        new SendGridNotificationService(mailServiceMock, sendGridTestApiKey, [])
+    ).toThrowError(
+      "SIMPLE_COMMENT_MODERATOR_CONTACT_EMAIL is not set in environmental variables"
+    )
+  })
+
+  it("should send notification to moderators", async () => {
+    const body = "Test message"
+    const clientResponse = {
+      statusCode: 202,
+      body: {},
+      headers: undefined,
+    }
+    const mockResponse: [ClientResponse, object] = [clientResponse, {}]
+
+    mailServiceMock.send.mockResolvedValueOnce(mockResponse)
+
+    const result = await sendGridNotificationService.notifyModerators(body)
+
+    expect(mailServiceMock.setApiKey).toHaveBeenCalledWith(sendGridTestApiKey)
+    expect(mailServiceMock.send).toHaveBeenCalledTimes(
+      moderatorContactEmails.length
+    )
+    expect(result.statusCode).toEqual(202)
+  })
+
+  it("should send mulitple emails given comma-separated SIMPLE_COMMENT_MODERATOR_CONTACT_EMAIL", async () => {
+    const body = "Test message"
+    const clientResponse = {
+      statusCode: 202,
+      body: {},
+      headers: undefined,
+    }
+    const mockResponse: [ClientResponse, object] = [clientResponse, {}]
+
+    mailServiceMock.send.mockResolvedValue(mockResponse)
+
+    const service = new SendGridNotificationService(
+      mailServiceMock,
+      sendGridTestApiKey
+    )
+    const result = await service.notifyModerators(body)
+
+    expect(mailServiceMock.setApiKey).toHaveBeenCalledWith(sendGridTestApiKey)
+    expect(mailServiceMock.send).toHaveBeenCalledTimes(10)
+    expect(result.statusCode).toEqual(202)
+  })
+
+  // Add more test cases as needed
+})
diff --git a/yarn.lock b/yarn.lock
index b36fb40..972f1ba 100644
--- a/yarn.lock
+++ b/yarn.lock
@@ -1774,6 +1774,16 @@
     "@types/node" "*"
     jest-mock "^29.6.2"
 
+"@jest/environment@^29.7.0":
+  version "29.7.0"
+  resolved "https://registry.yarnpkg.com/@jest/environment/-/environment-29.7.0.tgz#24d61f54ff1f786f3cd4073b4b94416383baf2a7"
+  integrity sha512-aQIfHDq33ExsN4jP1NWGXhxgQ/wixs60gDiKO+XVMd8Mn0NWPWgc34ZQDTb2jKaUWQ7MuwoitXAsN2XVXNMpAw==
+  dependencies:
+    "@jest/fake-timers" "^29.7.0"
+    "@jest/types" "^29.6.3"
+    "@types/node" "*"
+    jest-mock "^29.7.0"
+
 "@jest/expect-utils@^29.6.2":
   version "29.6.2"
   resolved "https://registry.yarnpkg.com/@jest/expect-utils/-/expect-utils-29.6.2.tgz#1b97f290d0185d264dd9fdec7567a14a38a90534"
@@ -1801,6 +1811,18 @@
     jest-mock "^29.6.2"
     jest-util "^29.6.2"
 
+"@jest/fake-timers@^29.7.0":
+  version "29.7.0"
+  resolved "https://registry.yarnpkg.com/@jest/fake-timers/-/fake-timers-29.7.0.tgz#fd91bf1fffb16d7d0d24a426ab1a47a49881a565"
+  integrity sha512-q4DH1Ha4TTFPdxLsqDXK1d3+ioSL7yL5oCMJZgDYm6i+6CygW5E5xVr/D1HdsGxjt1ZWSfUAs9OxSB/BNelWrQ==
+  dependencies:
+    "@jest/types" "^29.6.3"
+    "@sinonjs/fake-timers" "^10.0.2"
+    "@types/node" "*"
+    jest-message-util "^29.7.0"
+    jest-mock "^29.7.0"
+    jest-util "^29.7.0"
+
 "@jest/globals@^29.6.2":
   version "29.6.2"
   resolved "https://registry.yarnpkg.com/@jest/globals/-/globals-29.6.2.tgz#74af81b9249122cc46f1eb25793617eec69bf21a"
@@ -1848,6 +1870,13 @@
   dependencies:
     "@sinclair/typebox" "^0.27.8"
 
+"@jest/schemas@^29.6.3":
+  version "29.6.3"
+  resolved "https://registry.yarnpkg.com/@jest/schemas/-/schemas-29.6.3.tgz#430b5ce8a4e0044a7e3819663305a7b3091c8e03"
+  integrity sha512-mo5j5X+jIZmJQveBKeS/clAueipV7KgiX1vMgCxam1RNYiqE1w62n0/tJJnHtjW8ZHcQco5gY85jA3mi0L+nSA==
+  dependencies:
+    "@sinclair/typebox" "^0.27.8"
+
 "@jest/source-map@^29.6.0":
   version "29.6.0"
   resolved "https://registry.yarnpkg.com/@jest/source-map/-/source-map-29.6.0.tgz#bd34a05b5737cb1a99d43e1957020ac8e5b9ddb1"
@@ -1921,6 +1950,18 @@
     "@types/yargs" "^17.0.8"
     chalk "^4.0.0"
 
+"@jest/types@^29.6.3":
+  version "29.6.3"
+  resolved "https://registry.yarnpkg.com/@jest/types/-/types-29.6.3.tgz#1131f8cf634e7e84c5e77bab12f052af585fba59"
+  integrity sha512-u3UPsIilWKOM3F9CXtrG8LEJmNxwoCQC/XVj4IKYXvvpx7QIi/Kg1LI5uDmDpKlac62NUtX7eLjRh+jVZcLOzw==
+  dependencies:
+    "@jest/schemas" "^29.6.3"
+    "@types/istanbul-lib-coverage" "^2.0.0"
+    "@types/istanbul-reports" "^3.0.0"
+    "@types/node" "*"
+    "@types/yargs" "^17.0.8"
+    chalk "^4.0.0"
+
 "@jridgewell/gen-mapping@^0.3.0", "@jridgewell/gen-mapping@^0.3.2":
   version "0.3.3"
   resolved "https://registry.yarnpkg.com/@jridgewell/gen-mapping/-/gen-mapping-0.3.3.tgz#7e02e6eb5df901aaedb08514203b096614024098"
@@ -8622,7 +8663,7 @@ jest-environment-jsdom@^29.6.1:
     jest-util "^29.6.2"
     jsdom "^20.0.0"
 
-jest-environment-node@^29.6.1, jest-environment-node@^29.6.2:
+jest-environment-node@^29.6.2:
   version "29.6.2"
   resolved "https://registry.yarnpkg.com/jest-environment-node/-/jest-environment-node-29.6.2.tgz#a9ea2cabff39b08eca14ccb32c8ceb924c8bb1ad"
   integrity sha512-YGdFeZ3T9a+/612c5mTQIllvWkddPbYcN2v95ZH24oWMbGA4GGS2XdIF92QMhUhvrjjuQWYgUGW2zawOyH63MQ==
@@ -8634,6 +8675,18 @@ jest-environment-node@^29.6.1, jest-environment-node@^29.6.2:
     jest-mock "^29.6.2"
     jest-util "^29.6.2"
 
+jest-environment-node@^29.7.0:
+  version "29.7.0"
+  resolved "https://registry.yarnpkg.com/jest-environment-node/-/jest-environment-node-29.7.0.tgz#0b93e111dda8ec120bc8300e6d1fb9576e164376"
+  integrity sha512-DOSwCRqXirTOyheM+4d5YZOrWcdu0LNZ87ewUoywbcb2XR4wKgqiG8vNeYwhjFMbEkfju7wx2GYH0P2gevGvFw==
+  dependencies:
+    "@jest/environment" "^29.7.0"
+    "@jest/fake-timers" "^29.7.0"
+    "@jest/types" "^29.6.3"
+    "@types/node" "*"
+    jest-mock "^29.7.0"
+    jest-util "^29.7.0"
+
 jest-get-type@^27.5.1:
   version "27.5.1"
   resolved "https://registry.yarnpkg.com/jest-get-type/-/jest-get-type-27.5.1.tgz#3cd613c507b0f7ace013df407a1c1cd578bcb4f1"
@@ -8696,6 +8749,21 @@ jest-message-util@^29.6.2:
     slash "^3.0.0"
     stack-utils "^2.0.3"
 
+jest-message-util@^29.7.0:
+  version "29.7.0"
+  resolved "https://registry.yarnpkg.com/jest-message-util/-/jest-message-util-29.7.0.tgz#8bc392e204e95dfe7564abbe72a404e28e51f7f3"
+  integrity sha512-GBEV4GRADeP+qtB2+6u61stea8mGcOT4mCtrYISZwfu9/ISHFJ/5zOMXYbpBE9RsS5+Gb63DW4FgmnKJ79Kf6w==
+  dependencies:
+    "@babel/code-frame" "^7.12.13"
+    "@jest/types" "^29.6.3"
+    "@types/stack-utils" "^2.0.0"
+    chalk "^4.0.0"
+    graceful-fs "^4.2.9"
+    micromatch "^4.0.4"
+    pretty-format "^29.7.0"
+    slash "^3.0.0"
+    stack-utils "^2.0.3"
+
 jest-mock@^29.6.2:
   version "29.6.2"
   resolved "https://registry.yarnpkg.com/jest-mock/-/jest-mock-29.6.2.tgz#ef9c9b4d38c34a2ad61010a021866dad41ce5e00"
@@ -8705,6 +8773,15 @@ jest-mock@^29.6.2:
     "@types/node" "*"
     jest-util "^29.6.2"
 
+jest-mock@^29.7.0:
+  version "29.7.0"
+  resolved "https://registry.yarnpkg.com/jest-mock/-/jest-mock-29.7.0.tgz#4e836cf60e99c6fcfabe9f99d017f3fdd50a6347"
+  integrity sha512-ITOMZn+UkYS4ZFh83xYAOzWStloNzJFO2s8DWrE4lhtGD+AorgnbkiKERe4wQVBydIGPx059g6riW5Btp6Llnw==
+  dependencies:
+    "@jest/types" "^29.6.3"
+    "@types/node" "*"
+    jest-util "^29.7.0"
+
 jest-pnp-resolver@^1.2.2:
   version "1.2.3"
   resolved "https://registry.yarnpkg.com/jest-pnp-resolver/-/jest-pnp-resolver-1.2.3.tgz#930b1546164d4ad5937d5540e711d4d38d4cad2e"
@@ -8831,6 +8908,18 @@ jest-util@^29.0.0, jest-util@^29.6.2:
     graceful-fs "^4.2.9"
     picomatch "^2.2.3"
 
+jest-util@^29.7.0:
+  version "29.7.0"
+  resolved "https://registry.yarnpkg.com/jest-util/-/jest-util-29.7.0.tgz#23c2b62bfb22be82b44de98055802ff3710fc0bc"
+  integrity sha512-z6EbKajIpqGKU56y5KBUgy1dt1ihhQJgWzUlZHArA/+X2ad7Cb5iF+AK1EWVL/Bo7Rz9uurpqw6SiBCefUbCGA==
+  dependencies:
+    "@jest/types" "^29.6.3"
+    "@types/node" "*"
+    chalk "^4.0.0"
+    ci-info "^3.2.0"
+    graceful-fs "^4.2.9"
+    picomatch "^2.2.3"
+
 jest-validate@^27.3.1, jest-validate@^27.4.2:
   version "27.5.1"
   resolved "https://registry.yarnpkg.com/jest-validate/-/jest-validate-27.5.1.tgz#9197d54dc0bdb52260b8db40b46ae668e04df067"
@@ -11029,6 +11118,15 @@ pretty-format@^29.0.0, pretty-format@^29.6.2:
     ansi-styles "^5.0.0"
     react-is "^18.0.0"
 
+pretty-format@^29.7.0:
+  version "29.7.0"
+  resolved "https://registry.yarnpkg.com/pretty-format/-/pretty-format-29.7.0.tgz#ca42c758310f365bfa71a0bda0a807160b776812"
+  integrity sha512-Pdlw/oPxN+aXdmM9R00JVC9WVFoCLTKJvDVLgmJ+qAffBMxsV85l/Lu7sNx4zSzPyoL2euImuEwHhOXdEgNFZQ==
+  dependencies:
+    "@jest/schemas" "^29.6.3"
+    ansi-styles "^5.0.0"
+    react-is "^18.0.0"
+
 pretty-ms@^8.0.0:
   version "8.0.0"
   resolved "https://registry.yarnpkg.com/pretty-ms/-/pretty-ms-8.0.0.tgz#a35563b2a02df01e595538f86d7de54ca23194a3"