diff --git a/src/core/DigitalData.MessagingService.Application/Common/Dto/EmailAccounts/EmailAccountDto.cs b/src/core/DigitalData.MessagingService.Application/Common/Dto/EmailAccounts/EmailAccountDto.cs
index a531a42..5ab16f6 100644
--- a/src/core/DigitalData.MessagingService.Application/Common/Dto/EmailAccounts/EmailAccountDto.cs
+++ b/src/core/DigitalData.MessagingService.Application/Common/Dto/EmailAccounts/EmailAccountDto.cs
@@ -43,4 +43,14 @@ public record EmailAccountDto
     /// Use SSL/TLS when connecting to the IMAP server.
     /// </summary>
     public bool ImapUseSsl { get; set; } = true;
+
+    public string? Pop3Server { get; set; }
+
+    public int Pop3Port { get; set; } = 995;
+
+    public bool Pop3UseSsl { get; set; } = true;
+
+    public string? OAuth2ClientId { get; set; }
+
+    public string? OAuth2TenantId { get; set; }
 }
\ No newline at end of file
diff --git a/src/core/DigitalData.MessagingService.Application/Common/Dto/EmailAccounts/EmailAccountModificationDto.cs b/src/core/DigitalData.MessagingService.Application/Common/Dto/EmailAccounts/EmailAccountModificationDto.cs
index 6f2baa1..4775dd0 100644
--- a/src/core/DigitalData.MessagingService.Application/Common/Dto/EmailAccounts/EmailAccountModificationDto.cs
+++ b/src/core/DigitalData.MessagingService.Application/Common/Dto/EmailAccounts/EmailAccountModificationDto.cs
@@ -44,4 +44,16 @@ public record EmailAccountModificationDto
     /// Use SSL/TLS when connecting to the IMAP server.
     /// </summary>
     public bool ImapUseSsl { get; set; } = true;
+
+    public string? Pop3Server { get; set; }
+
+    public int Pop3Port { get; set; } = 995;
+
+    public bool Pop3UseSsl { get; set; } = true;
+
+    public string? OAuth2ClientId { get; set; }
+
+    public string? OAuth2ClientSecret { get; set; }
+
+    public string? OAuth2TenantId { get; set; }
 }
\ No newline at end of file
diff --git a/src/core/DigitalData.MessagingService.Application/Common/Dto/SendingEmailEvent.cs b/src/core/DigitalData.MessagingService.Application/Common/Dto/SendingEmailEvent.cs
index 5eadad2..b4bf498 100644
--- a/src/core/DigitalData.MessagingService.Application/Common/Dto/SendingEmailEvent.cs
+++ b/src/core/DigitalData.MessagingService.Application/Common/Dto/SendingEmailEvent.cs
@@ -19,4 +19,22 @@ public record SendingEmailEvent
 #else
     public required DateTime QueuedAt { get; init; }
 #endif
-}
\ No newline at end of file
+
+    /// <summary>
+    /// When true, the sent message will be appended to the IMAP Sent folder after sending.
+    /// </summary>
+#if NETFRAMEWORK
+    public bool UseImapAppend { get; set; } = false;
+#else
+    public bool UseImapAppend { get; init; } = false;
+#endif
+
+    /// <summary>
+    /// IMAP folder to append the sent message to (used when <see cref="UseImapAppend"/> is true).
+    /// </summary>
+#if NETFRAMEWORK
+    public string SentFolder { get; set; } = "Sent";
+#else
+    public string SentFolder { get; init; } = "Sent";
+#endif
+}