diff --git a/CUSTOM-TYPES.md b/CUSTOM-TYPES.md
index 7595440..5dafa06 100644
--- a/CUSTOM-TYPES.md
+++ b/CUSTOM-TYPES.md
@@ -38,13 +38,15 @@ const customEmail = await sendEmail<MyEmail>(payload, {
 })
 ```
 
-## ID Type Compatibility
+## Compatibility
 
-The plugin works with both:
+The plugin works with:
 - **String IDs**: `id: string`
 - **Number IDs**: `id: number`
+- **Nullable fields**: Fields can be `null`, `undefined`, or have values
+- **Generated types**: Works with `payload generate:types` output
 
-Your Payload configuration determines which type is used. The plugin automatically adapts to your setup.
+Your Payload configuration determines which types are used. The plugin automatically adapts to your setup.
 
 ## Type Definitions
 
@@ -55,33 +57,33 @@ interface BaseEmailDocument {
   id: string | number
   template?: any
   to: string[]
-  cc?: string[]
-  bcc?: string[]
-  from?: string
-  replyTo?: string
+  cc?: string[] | null
+  bcc?: string[] | null
+  from?: string | null
+  replyTo?: string | null
   subject: string
   html: string
-  text?: string
-  variables?: Record<string, any>
-  scheduledAt?: string
-  sentAt?: string
-  status?: 'pending' | 'processing' | 'sent' | 'failed'
-  attempts?: number
-  lastAttemptAt?: string
-  error?: string
-  priority?: number
-  createdAt?: string
-  updatedAt?: string
+  text?: string | null
+  variables?: Record<string, any> | null
+  scheduledAt?: string | null
+  sentAt?: string | null
+  status?: 'pending' | 'processing' | 'sent' | 'failed' | null
+  attempts?: number | null
+  lastAttemptAt?: string | null
+  error?: string | null
+  priority?: number | null
+  createdAt?: string | null
+  updatedAt?: string | null
 }
 
 interface BaseEmailTemplateDocument {
   id: string | number
   name: string
   slug: string
-  subject?: string
+  subject?: string | null
   content?: any
-  createdAt?: string
-  updatedAt?: string
+  createdAt?: string | null
+  updatedAt?: string | null
 }
 ```
 
diff --git a/package.json b/package.json
index af14f2c..5c68b02 100644
--- a/package.json
+++ b/package.json
@@ -1,6 +1,6 @@
 {
   "name": "@xtr-dev/payload-mailing",
-  "version": "0.1.13",
+  "version": "0.1.14",
   "description": "Template-based email system with scheduling and job processing for PayloadCMS",
   "type": "module",
   "main": "dist/index.js",
diff --git a/src/sendEmail.ts b/src/sendEmail.ts
index 63452b4..6ca74f5 100644
--- a/src/sendEmail.ts
+++ b/src/sendEmail.ts
@@ -83,12 +83,22 @@ export const sendEmail = async <TEmail extends BaseEmailDocument = BaseEmailDocu
   if (emailData.to) {
     emailData.to = parseAndValidateEmails(emailData.to as string | string[])
   }
-  if (emailData.cc) {
+  if (emailData.cc && emailData.cc !== null) {
     emailData.cc = parseAndValidateEmails(emailData.cc as string | string[])
   }
-  if (emailData.bcc) {
+  if (emailData.bcc && emailData.bcc !== null) {
     emailData.bcc = parseAndValidateEmails(emailData.bcc as string | string[])
   }
+  if (emailData.replyTo && emailData.replyTo !== null) {
+    const validated = parseAndValidateEmails(emailData.replyTo as string | string[])
+    // replyTo should be a single email, so take the first one if array
+    emailData.replyTo = validated && validated.length > 0 ? validated[0] : undefined
+  }
+  if (emailData.from && emailData.from !== null) {
+    const validated = parseAndValidateEmails(emailData.from as string | string[])
+    // from should be a single email, so take the first one if array
+    emailData.from = validated && validated.length > 0 ? validated[0] : undefined
+  }
 
   // Create the email in the collection with proper typing
   const email = await payload.create({
diff --git a/src/types/index.ts b/src/types/index.ts
index ce8736e..1e42760 100644
--- a/src/types/index.ts
+++ b/src/types/index.ts
@@ -2,38 +2,38 @@ import { Payload } from 'payload'
 import type { CollectionConfig, RichTextField } from 'payload'
 import { Transporter } from 'nodemailer'
 
-// Generic base interfaces that work with any ID type
+// Generic base interfaces that work with any ID type and null values
 export interface BaseEmailDocument {
   id: string | number
   template?: any
   to: string[]
-  cc?: string[]
-  bcc?: string[]
-  from?: string
-  replyTo?: string
+  cc?: string[] | null
+  bcc?: string[] | null
+  from?: string | null
+  replyTo?: string | null
   subject: string
   html: string
-  text?: string
-  variables?: Record<string, any>
-  scheduledAt?: string
-  sentAt?: string
-  status?: 'pending' | 'processing' | 'sent' | 'failed'
-  attempts?: number
-  lastAttemptAt?: string
-  error?: string
-  priority?: number
-  createdAt?: string
-  updatedAt?: string
+  text?: string | null
+  variables?: Record<string, any> | null
+  scheduledAt?: string | null
+  sentAt?: string | null
+  status?: 'pending' | 'processing' | 'sent' | 'failed' | null
+  attempts?: number | null
+  lastAttemptAt?: string | null
+  error?: string | null
+  priority?: number | null
+  createdAt?: string | null
+  updatedAt?: string | null
 }
 
 export interface BaseEmailTemplateDocument {
   id: string | number
   name: string
   slug: string
-  subject?: string
+  subject?: string | null
   content?: any
-  createdAt?: string
-  updatedAt?: string
+  createdAt?: string | null
+  updatedAt?: string | null
 }
 
 export type BaseEmail<TEmail extends BaseEmailDocument = BaseEmailDocument, TEmailTemplate extends BaseEmailTemplateDocument = BaseEmailTemplateDocument> = Omit<TEmail, 'id' | 'template'> & {template: Omit<TEmailTemplate, 'id'> | TEmailTemplate['id'] | undefined | null}
@@ -75,23 +75,23 @@ export interface MailingTransportConfig {
 
 export interface QueuedEmail {
   id: string
-  template?: string
+  template?: string | null
   to: string[]
-  cc?: string[]
-  bcc?: string[]
-  from?: string
-  replyTo?: string
+  cc?: string[] | null
+  bcc?: string[] | null
+  from?: string | null
+  replyTo?: string | null
   subject: string
   html: string
-  text?: string
-  variables?: Record<string, any>
-  scheduledAt?: string
-  sentAt?: string
+  text?: string | null
+  variables?: Record<string, any> | null
+  scheduledAt?: string | null
+  sentAt?: string | null
   status: 'pending' | 'processing' | 'sent' | 'failed'
   attempts: number
-  lastAttemptAt?: string
-  error?: string
-  priority?: number
+  lastAttemptAt?: string | null
+  error?: string | null
+  priority?: number | null
   createdAt: string
   updatedAt: string
 }