exceptionless · niemyjski · Aug 27, 2026 · Aug 25, 2026 · Aug 25, 2026 · Aug 26, 2026
diff --git a/src/Exceptionless.Core/Mail/Mailer.cs b/src/Exceptionless.Core/Mail/Mailer.cs
@@ -1,4 +1,5 @@
 using System.Collections.Concurrent;
+using System.Text.Json;
 using Exceptionless.Core.Extensions;
 using Exceptionless.Core.Models;
 using Exceptionless.Core.Plugins.Formatting;
@@ -8,12 +9,14 @@
 using Foundatio.Serializer;
 using HandlebarsDotNet;
 using Microsoft.Extensions.Logging;
+using NetMailAddress = System.Net.Mail.MailAddress;
 
 namespace Exceptionless.Core.Mail;
 
 public class Mailer : IMailer
 {
     private readonly ConcurrentDictionary<string, HandlebarsTemplate<object, object>> _cachedTemplates = new();
+    private readonly IHandlebars _handlebars = Handlebars.Create();
     private readonly IQueue<MailMessage> _queue;
     private readonly FormattingPluginManager _pluginManager;
     private readonly AppOptions _appOptions;
@@ -29,6 +32,12 @@ public Mailer(IQueue<MailMessage> queue, FormattingPluginManager pluginManager,
         _timeProvider = timeProvider;
         _serializer = serializer;
         _logger = logger;
+
+        _handlebars.RegisterHelper("json", (writer, _, parameters) =>
+        {
+            object? value = parameters.Length > 0 ? parameters[0] : null;
+            writer.WriteSafeString(JsonSerializer.Serialize(value));
+        });
     }
 
     public async Task<bool> SendContactRequestAsync(string name, string emailAddress, string? company, string? subject, string message, string? clientIpAddress, string? userAgent, string? referrer)
@@ -115,7 +124,10 @@ private void AddUserInfo(PersistentEvent ev, Dictionary<string, object?> data)
             data["UserDescription"] = ud.Description;
 
         if (!String.IsNullOrEmpty(ud?.EmailAddress))
+        {
             data["UserEmail"] = ud.EmailAddress;
+            data["UserEmailHref"] = BuildMailtoHref(ud.EmailAddress, ud.Description);
+        }
 
         string? displayName = null;
         if (!String.IsNullOrEmpty(ui?.Identity))
@@ -135,6 +147,19 @@ private void AddUserInfo(PersistentEvent ev, Dictionary<string, object?> data)
         data["HasUserInfo"] = ud is not null || ui is not null;
     }
 
+    private static string BuildMailtoHref(string emailAddress, string? body)
+    {
+        string address = NetMailAddress.TryCreate(emailAddress, out NetMailAddress? parsedAddress)
+            ? parsedAddress.Address
+            : emailAddress;
+        int atIndex = address.LastIndexOf('@');
+        string escapedAddress = atIndex > 0
+            ? $"{Uri.EscapeDataString(address[..atIndex])}@{Uri.EscapeDataString(address[(atIndex + 1)..])}"
+            : Uri.EscapeDataString(address);
+        string href = $"mailto:{escapedAddress}";
+        return String.IsNullOrEmpty(body) ? href : $"{href}?body={Uri.EscapeDataString(body)}";
+    }
+
     private static void AddDefaultFields(PersistentEvent ev, Dictionary<string, object?> data)
     {
         if (ev.Tags?.Count > 0)
@@ -269,7 +294,8 @@ private static IEnumerable<object> GetStackTemplateData(IEnumerable<Stack> stack
             StackId = s.Id,
             Title = s.Title.Truncate(50),
             TypeName = s.GetTypeName()?.Truncate(50),
-            s.Status
+            s.Status,
+            IsRegressed = s.Status == StackStatus.Regressed
         });
     }
 
@@ -334,7 +360,7 @@ private HandlebarsTemplate<object, object> GetCompiledTemplate(string name)
             using var reader = new StreamReader(stream ?? throw new InvalidOperationException());
 
             string template = reader.ReadToEnd();
-            var compiledTemplateFunc = Handlebars.Compile(template);
+            var compiledTemplateFunc = _handlebars.Compile(template);
             return compiledTemplateFunc;
         });
     }

diff --git a/src/Exceptionless.Core/Mail/Templates/event-notice.html b/src/Exceptionless.Core/Mail/Templates/event-notice.html
diff --git a/src/Exceptionless.Core/Mail/Templates/organization-added.html b/src/Exceptionless.Core/Mail/Templates/organization-added.html
diff --git a/src/Exceptionless.Core/Mail/Templates/organization-invited.html b/src/Exceptionless.Core/Mail/Templates/organization-invited.html
diff --git a/src/Exceptionless.Core/Mail/Templates/organization-notice.html b/src/Exceptionless.Core/Mail/Templates/organization-notice.html
@@ -1,7 +1,7 @@
 <!DOCTYPE html PUBLIC "-//W3C//DTD XHTML 1.0 Transitional//EN" "http://www.w3.org/TR/xhtml1/DTD/xhtml1-transitional.dtd"><html xmlns="http://www.w3.org/1999/xhtml" lang="en" xml:lang="en" style="background:#f7f7f7!important"><head><meta http-equiv="Content-Type" content="text/html; charset=utf-8"><meta name="viewport" content="width=device-width"><title>{{Subject}}</title><style>@media only screen{html{min-height:100%;background:#f7f7f7}}@media only screen and (max-width:596px){table.body img{width:auto;height:auto}table.body center{min-width:0!important}table.body .container{width:95%!important}table.body .columns{height:auto!important;-moz-box-sizing:border-box;-webkit-box-sizing:border-box;box-sizing:border-box;padding-left:16px!important;padding-right:16px!important}th.small-3{display:inline-block!important;width:25%!important}th.small-4{display:inline-block!important;width:33.33333%!important}th.small-12{display:inline-block!important;width:100%!important}table.menu{width:100%!important}table.menu td,table.menu th{width:auto!important;display:inline-block!important}table.menu.vertical td,table.menu.vertical th{display:block!important}table.menu[align=center]{width:auto!important}}</style></head><body style="-moz-box-sizing:border-box;-ms-text-size-adjust:100%;-webkit-box-sizing:border-box;-webkit-text-size-adjust:100%;Margin:0;background:#f7f7f7!important;box-sizing:border-box;color:#2c2c2c;font-family:Helvetica,Arial,sans-serif;font-size:16px;font-weight:400;line-height:1.3;margin:0;min-width:100%;padding:0;text-align:left;width:100%!important"><span class="preheader" style="color:#f7f7f7;display:none!important;font-size:1px;line-height:1px;max-height:0;max-width:0;mso-hide:all!important;opacity:0;overflow:hidden;visibility:hidden"></span><table class="body" style="Margin:0;background:#f7f7f7!important;border-collapse:collapse;border-spacing:0;color:#2c2c2c;font-family:Helvetica,Arial,sans-serif;font-size:16px;font-weight:400;height:100%;line-height:1.3;margin:0;padding:0;text-align:left;vertical-align:top;width:100%"><tr style="padding:0;text-align:left;vertical-align:top"><td class="center" align="center" valign="top" style="-moz-hyphens:auto;-webkit-hyphens:auto;Margin:0;border-collapse:collapse!important;color:#2c2c2c;font-family:Helvetica,Arial,sans-serif;font-size:16px;font-weight:400;hyphens:auto;line-height:1.3;margin:0;padding:0;text-align:left;vertical-align:top;word-wrap:break-word"><center data-parsed style="min-width:580px;width:100%"><table align="center" class="wrapper header float-center" style="Margin:0 auto;background:#2c2c2c;border-collapse:collapse;border-spacing:0;float:none;margin:0 auto;padding:0;text-align:center;vertical-align:top;width:100%"><tr style="padding:0;text-align:left;vertical-align:top"><td class="wrapper-inner" style="-moz-hyphens:auto;-webkit-hyphens:auto;Margin:0;border-collapse:collapse!important;color:#2c2c2c;font-family:Helvetica,Arial,sans-serif;font-size:16px;font-weight:400;hyphens:auto;line-height:1.3;margin:0;padding:8px 15px;text-align:left;vertical-align:top;word-wrap:break-word"><table align="center" class="container" style="Margin:0 auto;background:0 0;border-collapse:collapse;border-spacing:0;margin:0 auto;padding:0;text-align:inherit;vertical-align:top;width:580px"><tbody><tr style="padding:0;text-align:left;vertical-align:top"><td style="-moz-hyphens:auto;-webkit-hyphens:auto;Margin:0;border-collapse:collapse!important;color:#2c2c2c;font-family:Helvetica,Arial,sans-serif;font-size:16px;font-weight:400;hyphens:auto;line-height:1.3;margin:0;padding:0;text-align:left;vertical-align:top;word-wrap:break-word"><img src="https://be.exceptionless.io/img/exceptionless-logo.png" alt="Exceptionless" style="-ms-interpolation-mode:bicubic;clear:both;display:block;margin-left:15px;max-width:100%;outline:0;text-decoration:none;width:auto"></td></tr></tbody></table></td></tr></table><table align="center" class="container float-center" style="Margin:0 auto;background:#f7f7f7;border-collapse:collapse;border-spacing:0;float:none;margin:0 auto;padding:0;text-align:center;vertical-align:top;width:580px"><tbody><tr style="padding:0;text-align:left;vertical-align:top"><td style="-moz-hyphens:auto;-webkit-hyphens:auto;Margin:0;border-collapse:collapse!important;color:#2c2c2c;font-family:Helvetica,Arial,sans-serif;font-size:16px;font-weight:400;hyphens:auto;line-height:1.3;margin:0;padding:0;text-align:left;vertical-align:top;word-wrap:break-word"><table class="spacer" style="border-collapse:collapse;border-spacing:0;padding:0;text-align:left;vertical-align:top;width:100%"><tbody><tr style="padding:0;text-align:left;vertical-align:top"><td height="5px" style="-moz-hyphens:auto;-webkit-hyphens:auto;Margin:0;border-collapse:collapse!important;color:#2c2c2c;font-family:Helvetica,Arial,sans-serif;font-size:5px;font-weight:400;hyphens:auto;line-height:5px;margin:0;mso-line-height-rule:exactly;padding:0;text-align:left;vertical-align:top;word-wrap:break-word">&#xA0;</td></tr></tbody></table><table class="row" style="border-collapse:collapse;border-spacing:0;display:table;padding:0;position:relative;text-align:left;vertical-align:top;width:100%"><tbody><tr style="padding:0;text-align:left;vertical-align:top"><th class="small-12 large-12 columns first last" style="Margin:0 auto;color:#2c2c2c;font-family:Helvetica,Arial,sans-serif;font-size:16px;font-weight:400;line-height:1.3;margin:0 auto;padding:0;padding-bottom:16px;padding-left:16px;padding-right:16px;text-align:left;width:564px"><table style="border-collapse:collapse;border-spacing:0;padding:0;text-align:left;vertical-align:top;width:100%"><tr style="padding:0;text-align:left;vertical-align:top"><th style="Margin:0;color:#2c2c2c;font-family:Helvetica,Arial,sans-serif;font-size:16px;font-weight:400;line-height:1.3;margin:0;padding:0;text-align:left"><p class="lead" style="Margin:0;Margin-bottom:10px;color:#2c2c2c;font-family:Helvetica,Arial,sans-serif;font-size:20px;font-weight:400;line-height:1.6;margin:0;margin-bottom:10px;padding:0;text-align:left">{{#if IsOverMonthlyLimit}} {{OrganizationName}} has reached its monthly plan limit. Upgrade now to to continue receiving events. {{else if IsOverHourlyLimit}} Events are currently being throttled for {{OrganizationName}} until {{ThrottledUntil}} UTC to prevent using up your plan limit in a small window of time. Upgrade now to increase your limits. {{/if}}</p><center data-parsed style="min-width:532px;width:100%"><table class="button button radius float-center" style="Margin:0 0 16px 0;border-collapse:collapse;border-spacing:0;float:none;margin:0 0 16px 0;padding:0;text-align:center;vertical-align:top;width:auto"><tr style="padding:0;text-align:left;vertical-align:top"><td style="-moz-hyphens:auto;-webkit-hyphens:auto;Margin:0;border-collapse:collapse!important;color:#2c2c2c;font-family:Helvetica,Arial,sans-serif;font-size:16px;font-weight:400;hyphens:auto;line-height:1.3;margin:0;padding:0;text-align:left;vertical-align:top;word-wrap:break-word"><table style="border-collapse:collapse;border-spacing:0;padding:0;text-align:left;vertical-align:top;width:100%"><tr style="padding:0;text-align:left;vertical-align:top"><td style="-moz-hyphens:auto;-webkit-hyphens:auto;Margin:0;background:#5E9A00;border:none;border-collapse:collapse!important;border-radius:3px;color:#fefefe;font-family:Helvetica,Arial,sans-serif;font-size:16px;font-weight:400;hyphens:auto;line-height:1.3;margin:0;padding:0;text-align:left;vertical-align:top;word-wrap:break-word"><a href="{{BaseUrl}}/organization/{{OrganizationId}}/upgrade" style="Margin:0;border:0 solid #5E9A00;border-radius:3px;color:#fefefe;display:inline-block;font-family:Helvetica,Arial,sans-serif;font-size:16px;font-weight:700;line-height:1.3;margin:0;padding:8px 16px 8px 16px;text-align:left;text-decoration:none">Upgrade Plan </a></td></tr></table></td></tr></table></center><table class="spacer" style="border-collapse:collapse;border-spacing:0;padding:0;text-align:left;vertical-align:top;width:100%"><tbody><tr style="padding:0;text-align:left;vertical-align:top"><td height="5px" style="-moz-hyphens:auto;-webkit-hyphens:auto;Margin:0;border-collapse:collapse!important;color:#2c2c2c;font-family:Helvetica,Arial,sans-serif;font-size:5px;font-weight:400;hyphens:auto;line-height:5px;margin:0;mso-line-height-rule:exactly;padding:0;text-align:left;vertical-align:top;word-wrap:break-word">&#xA0;</td></tr></tbody></table><p style="Margin:0;Margin-bottom:10px;color:#2c2c2c;font-family:Helvetica,Arial,sans-serif;font-size:16px;font-weight:400;line-height:1.3;margin:0;margin-bottom:10px;padding:0;text-align:left">{{#if IsOverMonthlyLimit}} <a href="https://github.com/exceptionless/Exceptionless/wiki/Frequently-Asked-Questions#q-what-happens-if-the-organization-plan-limit-is-reached" style="Margin:0;color:#5E9A00;font-family:Helvetica,Arial,sans-serif;font-weight:400;line-height:1.3;margin:0;padding:0;text-align:left;text-decoration:none">Learn more about what happens when the plan limit is reached. </a>{{else if IsOverHourlyLimit}} <a href="https://github.com/exceptionless/Exceptionless/wiki/Frequently-Asked-Questions#q-why-is-my-organization-throttled" style="Margin:0;color:#5E9A00;font-family:Helvetica,Arial,sans-serif;font-weight:400;line-height:1.3;margin:0;padding:0;text-align:left;text-decoration:none">Learn more about being throttled. </a>{{/if}} You can also view the <a href="{{BaseUrl}}/organization/{{OrganizationId}}/frequent" style="Margin:0;color:#5E9A00;font-family:Helvetica,Arial,sans-serif;font-weight:400;line-height:1.3;margin:0;padding:0;text-align:left;text-decoration:none">most frequent events</a> to to see an overall picture of the events that are being counting against your plan limits.</p><table class="spacer" style="border-collapse:collapse;border-spacing:0;padding:0;text-align:left;vertical-align:top;width:100%"><tbody><tr style="padding:0;text-align:left;vertical-align:top"><td height="5px" style="-moz-hyphens:auto;-webkit-hyphens:auto;Margin:0;border-collapse:collapse!important;color:#2c2c2c;font-family:Helvetica,Arial,sans-serif;font-size:5px;font-weight:400;hyphens:auto;line-height:5px;margin:0;mso-line-height-rule:exactly;padding:0;text-align:left;vertical-align:top;word-wrap:break-word">&#xA0;</td></tr></tbody></table><p style="Margin:0;Margin-bottom:10px;color:#2c2c2c;font-family:Helvetica,Arial,sans-serif;font-size:16px;font-weight:400;line-height:1.3;margin:0;margin-bottom:10px;padding:0;text-align:left">Please send us an email at <a href="mailto:support@exceptionless.io" style="Margin:0;color:#5E9A00;font-family:Helvetica,Arial,sans-serif;font-weight:400;line-height:1.3;margin:0;padding:0;text-align:left;text-decoration:none">support@exceptionless.io</a> if you have any questions or conserns.</p></th><th class="expander" style="Margin:0;color:#2c2c2c;font-family:Helvetica,Arial,sans-serif;font-size:16px;font-weight:400;line-height:1.3;margin:0;padding:0!important;text-align:left;visibility:hidden;width:0"></th></tr></table></th></tr></tbody></table><table class="wrapper actions" align="center" style="border-collapse:collapse;border-spacing:0;padding:0;text-align:left;vertical-align:top;width:100%"><tr style="padding:0;text-align:left;vertical-align:top"><td class="wrapper-inner" style="-moz-hyphens:auto;-webkit-hyphens:auto;Margin:0;border-collapse:collapse!important;color:#2c2c2c;font-family:Helvetica,Arial,sans-serif;font-size:16px;font-weight:400;hyphens:auto;line-height:1.3;margin:0;padding:0;text-align:left;vertical-align:top;word-wrap:break-word"><table class="row" style="border-collapse:collapse;border-spacing:0;display:table;padding:0;position:relative;text-align:left;vertical-align:top;width:100%"><tbody><tr style="padding:0;text-align:left;vertical-align:top"><th class="small-12 large-12 columns first last" style="Margin:0 auto;color:#2c2c2c;font-family:Helvetica,Arial,sans-serif;font-size:16px;font-weight:400;line-height:1.3;margin:0 auto;padding:0;padding-bottom:16px;padding-left:16px;padding-right:16px;text-align:left;width:564px"><table style="border-collapse:collapse;border-spacing:0;padding:0;text-align:left;vertical-align:top;width:100%"><tr style="padding:0;text-align:left;vertical-align:top"><th style="Margin:0;color:#2c2c2c;font-family:Helvetica,Arial,sans-serif;font-size:16px;font-weight:400;line-height:1.3;margin:0;padding:0;text-align:left"><h5 style="Margin:0;Margin-bottom:10px;color:#939393;font-family:Helvetica,Arial,sans-serif;font-size:20px;font-weight:400;line-height:1.3;margin:0;margin-bottom:5px;margin-top:0;padding:0;text-align:left;word-wrap:normal">Other Actions</h5><ul style="margin-top:0"><li style="margin-left:5px;margin-top:5px"><a href="{{BaseUrl}}/organization/{{OrganizationId}}/manage" style="Margin:0;color:#6EBC1A;font-family:Helvetica,Arial,sans-serif;font-weight:400;line-height:1.3;margin:0;padding:0;text-align:left;text-decoration:none">View usage</a></li><li style="margin-left:5px;margin-top:5px"><a href="{{BaseUrl}}/account/manage?tab=notifications" style="Margin:0;color:#6EBC1A;font-family:Helvetica,Arial,sans-serif;font-weight:400;line-height:1.3;margin:0;padding:0;text-align:left;text-decoration:none">Change your notification settings</a></li></ul></th><th class="expander" style="Margin:0;color:#2c2c2c;font-family:Helvetica,Arial,sans-serif;font-size:16px;font-weight:400;line-height:1.3;margin:0;padding:0!important;text-align:left;visibility:hidden;width:0"></th></tr></table></th></tr></tbody></table></td></tr></table></td></tr></tbody></table><script type="application/ld+json" align="center" class="float-center">{
   "@context": "http://schema.org",
   "@type": "EmailMessage",
-  "description": "{{Subject}}",
+  "description": {{json Subject}},
   "potentialAction": {
     "@type": "ViewAction",
     "target": "{{BaseUrl}}/organization/{{OrganizationId}}/upgrade",
@@ -14,4 +14,4 @@
     "url": "https://exceptionless.com",
     "logo": "https://be.exceptionless.io/img/exceptionless-48.png"
   }
-}</script></center></td></tr></table><!-- prevent Gmail on iOS font size manipulation --><div style="display:none;white-space:nowrap;font:15px courier;line-height:0">&nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp;</div></body></html>
+}</script></center></td></tr></table><!-- prevent Gmail on iOS font size manipulation --><div style="display:none;white-space:nowrap;font:15px courier;line-height:0">&nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp;</div></body></html>