--- a/talos-pool/master.cfg
+++ b/talos-pool/master.cfg
@@ -131,17 +131,17 @@ for branch, branch_config in BRANCHES.it
                 s = scheduler_class(name='%s %s scheduler' % (branch, slave_platform),
                               branch='%s-%s' % (branch, platform),
                               treeStableTimer=0,
                               builderNames=[builder['name']],
                               numberOfBuildsToTrigger=chrome_tests,
                               )
                 c['schedulers'].append(s)
                 c['builders'].append(builder)
-                branch_builders.append(builder)
+                branch_builders.append(builder['name'])
 
             if nochrome_tests:
                 nochrome_factory = TalosFactory(
                     OS=slave_platform,
                     toolsDir="tools",
                     envName=platform_config['env_name'],
                     workdirBase="../talos-data",
                     buildBranch=buildBranch,
@@ -164,18 +164,18 @@ for branch, branch_config in BRANCHES.it
                 s = scheduler_class(name='%s %s nochrome scheduler' % (branch, slave_platform),
                               branch='%s-%s' % (branch, platform),
                               treeStableTimer=0,
                               builderNames=[builder['name']],
                               numberOfBuildsToTrigger=nochrome_tests,
                               )
                 c['schedulers'].append(s)
                 c['builders'].append(builder)
-                branch_builders.append(builder)
+                branch_builders.append(builder['name'])
 
     c['status'].append(tinderbox.TinderboxMailNotifier(
                            fromaddr="talos.buildbot@build.mozilla.org",
                            tree=branchName,
                            extraRecipients=["tinderbox-daemon@tinderbox.mozilla.org",],
                            relayhost="smtp.mozilla.org",
-                           builders=None,
+                           builders=branch_builders,
                            useChangeTime=True,
                            logCompression="bzip2"))