diff --git a/Server/Pages/GetSupport.cshtml.cs b/Server/Pages/GetSupport.cshtml.cs
index ed995857..ee4c2ed0 100644
--- a/Server/Pages/GetSupport.cshtml.cs
+++ b/Server/Pages/GetSupport.cshtml.cs
@@ -28,25 +28,26 @@ namespace Remotely.Server.Pages
             return Page();
         }
 
-        public async Task<IActionResult> OnPost(string deviceID)
+        public async Task<IActionResult> OnPost(string deviceId)
         {
             if (!ModelState.IsValid)
             {
                 return Page();
             }
 
-            var orgID = _dataService.GetDevice(deviceID)?.OrganizationID;
+            var orgID = _dataService.GetDevice(deviceId)?.OrganizationID;
 
             var alertParts = new string[]
             {
                 $"{Input.Name} is requesting support.",
+                $"Device ID: {deviceId}",
                 $"Email: {Input.Email}.",
                 $"Phone: {Input.Phone}.",
                 $"Chat OK: {Input.ChatResponseOk}."
             };
 
             var alertMessage = string.Join("  ", alertParts);
-            await _dataService.AddAlert(deviceID, orgID, alertMessage);
+            await _dataService.AddAlert(deviceId, orgID, alertMessage);
 
             var orgUsers = await _dataService.GetAllUsersInOrganization(orgID);
             var emailMessage = string.Join("<br />", alertParts);
@@ -57,7 +58,7 @@ namespace Remotely.Server.Pages
 
             StatusMessage = "We got it!  Someone will contact you soon.";
 
-            return RedirectToPage("GetSupport", new { deviceID });
+            return RedirectToPage("GetSupport", new { deviceId });
         }
 
         public class InputModel
diff --git a/Server/Pages/ServerConfig.razor b/Server/Pages/ServerConfig.razor
index 71b72c93..b0dd73a8 100644
--- a/Server/Pages/ServerConfig.razor
+++ b/Server/Pages/ServerConfig.razor
@@ -250,6 +250,16 @@
                     <br />
                     <ValidationMessage For="() => Input.SmtpPort" />
                 </div>
+                <div class="form-group">
+                    <label class="control-label">SMTP Check Certificate Revocation</label>
+                    <div class="small text-muted">
+                        This sometimes needs to be disabled for Let's Encrypt certificates.
+                    </div>
+                    <br />
+                    <InputCheckbox @bind-Value="Input.SmtpCheckCertificateRevocation" autocomplete="off" />
+                    <br />
+                    <ValidationMessage For="() => Input.SmtpCheckCertificateRevocation" />
+                </div>
                 <div class="form-group">
                     <label class="control-label">SMTP Local Domain</label>
                     <br />
diff --git a/Server/Pages/ServerConfig.razor.cs b/Server/Pages/ServerConfig.razor.cs
index 974c2678..c4c5b98d 100644
--- a/Server/Pages/ServerConfig.razor.cs
+++ b/Server/Pages/ServerConfig.razor.cs
@@ -84,6 +84,9 @@ namespace Remotely.Server.Pages
         [Display(Name = "SMTP Local Domain")]
         public string SmtpLocalDomain { get; set; }
 
+        [Display(Name = "SMTP Check Certificate Revocation")]
+        public bool SmtpCheckCertificateRevocation { get; set; }
+
         [Display(Name = "SMTP Password")]
         public string SmtpPassword { get; set; }
 
@@ -320,7 +323,7 @@ namespace Remotely.Server.Pages
             }
             else
             {
-                ToastService.ShowToast("Error sending email.  Check the server logs for details.");
+                ToastService.ShowToast("Error sending email.  Check the server logs for details.", classString: "bg-error");
                 _alertMessage = "Error sending email.  Check the server logs for details.";
             }
         }
diff --git a/Server/Services/ApplicationConfig.cs b/Server/Services/ApplicationConfig.cs
index cb072afe..a00a28c2 100644
--- a/Server/Services/ApplicationConfig.cs
+++ b/Server/Services/ApplicationConfig.cs
@@ -30,6 +30,7 @@ namespace Remotely.Server.Services
         string SmtpPassword { get; }
         int SmtpPort { get; }
         string SmtpUserName { get; }
+        bool SmtpCheckCertificateRevocation { get; }
         Theme Theme { get; }
         string[] TrustedCorsOrigins { get; }
         bool UseHsts { get; }
@@ -72,6 +73,7 @@ namespace Remotely.Server.Services
         public string SmtpPassword => Config["ApplicationOptions:SmtpPassword"];
         public int SmtpPort => int.Parse(Config["ApplicationOptions:SmtpPort"] ?? "25");
         public string SmtpUserName => Config["ApplicationOptions:SmtpUserName"];
+        public bool SmtpCheckCertificateRevocation => bool.Parse(Config["ApplicationOptions:SmtpCheckCertificateRevocation"] ?? "true");
         public Theme Theme => Enum.Parse<Theme>(Config["ApplicationOptions:Theme"] ?? "Dark", true);
         public string[] TrustedCorsOrigins => Config.GetSection("ApplicationOptions:TrustedCorsOrigins").Get<string[]>() ?? System.Array.Empty<string>();
         public bool UseHsts => bool.Parse(Config["ApplicationOptions:UseHsts"] ?? "false");
diff --git a/Server/Services/EmailSender.cs b/Server/Services/EmailSender.cs
index 0e2f4971..e92816f9 100644
--- a/Server/Services/EmailSender.cs
+++ b/Server/Services/EmailSender.cs
@@ -46,6 +46,9 @@ namespace Remotely.Server.Services
                 {
                     client.LocalDomain = AppConfig.SmtpLocalDomain;
                 }
+
+                client.CheckCertificateRevocation = AppConfig.SmtpCheckCertificateRevocation;
+
                 await client.ConnectAsync(AppConfig.SmtpHost, AppConfig.SmtpPort);
 
                 await client.AuthenticateAsync(AppConfig.SmtpUserName, AppConfig.SmtpPassword);
diff --git a/Server/appsettings.json b/Server/appsettings.json
index 3a647bc1..3d679156 100644
--- a/Server/appsettings.json
+++ b/Server/appsettings.json
@@ -45,6 +45,7 @@
     "SmtpPassword": "",
     "SmtpPort": 587,
     "SmtpUserName": "",
+    "SmtpCheckCertificateRevocation": true,
     "Theme": "Dark",
     "TrustedCorsOrigins": [],
     "UseHsts": false,