diff --git a/java/google/registry/config/RegistryConfig.java b/java/google/registry/config/RegistryConfig.java
index 813946e75..551a7d184 100644
--- a/java/google/registry/config/RegistryConfig.java
+++ b/java/google/registry/config/RegistryConfig.java
@@ -827,20 +827,6 @@ public final class RegistryConfig {
       return config.misc.alertRecipientEmailAddress;
     }
 
-    /**
-     * Returns the email address we send emails from.
-     *
-     * @see google.registry.reporting.icann.ReportingEmailUtils
-     * @see google.registry.reporting.billing.BillingEmailUtils
-     * @see google.registry.reporting.spec11.Spec11EmailUtils
-     */
-    @Provides
-    @Config("alertSenderEmailAddress")
-    public static String provideAlertSenderEmailAddress(
-        @Config("projectId") String projectId, RegistryConfigSettings config) {
-      return String.format("%s-no-reply@%s", projectId, config.misc.alertEmailSenderDomain);
-    }
-
     /**
      * Returns the email address to which spec 11 email should be replied.
      *
diff --git a/java/google/registry/config/RegistryConfigSettings.java b/java/google/registry/config/RegistryConfigSettings.java
index 2449c1c58..404ce1254 100644
--- a/java/google/registry/config/RegistryConfigSettings.java
+++ b/java/google/registry/config/RegistryConfigSettings.java
@@ -161,7 +161,6 @@ public class RegistryConfigSettings {
     public String sheetExportId;
     public String alertRecipientEmailAddress;
     public String spec11ReplyToEmailAddress;
-    public String alertEmailSenderDomain;
     public int asyncDeleteDelaySeconds;
   }
 
diff --git a/java/google/registry/config/files/default-config.yaml b/java/google/registry/config/files/default-config.yaml
index 85fe99625..b5deec22f 100644
--- a/java/google/registry/config/files/default-config.yaml
+++ b/java/google/registry/config/files/default-config.yaml
@@ -22,6 +22,9 @@ gSuite:
   domainName: domain-registry.example
 
   # Display name and email address used on outgoing emails through G Suite.
+  # The email address must be valid and have permission in the GAE app to send
+  # emails. For more info see:
+  # https://cloud.google.com/appengine/docs/standard/java/mail/#who_can_send_mail
   outgoingEmailDisplayName: Example Registry
   outgoingEmailAddress: noreply@project-id.appspotmail.com
 
@@ -343,9 +346,6 @@ misc:
   # to be a deliverable email address in case the registrars want to contact us.
   spec11ReplyToEmailAddress: reply-to@example.com
 
-  # Domain for the email address we send alert summary emails from.
-  alertEmailSenderDomain: appspotmail.com
-
   # How long to delay processing of asynchronous deletions. This should always
   # be longer than eppResourceCachingSeconds, to prevent deleted contacts or
   # hosts from being used on domains.
diff --git a/java/google/registry/reporting/billing/BillingEmailUtils.java b/java/google/registry/reporting/billing/BillingEmailUtils.java
index ae91c7981..918074949 100644
--- a/java/google/registry/reporting/billing/BillingEmailUtils.java
+++ b/java/google/registry/reporting/billing/BillingEmailUtils.java
@@ -44,7 +44,7 @@ class BillingEmailUtils {
 
   private final SendEmailService emailService;
   private final YearMonth yearMonth;
-  private final String alertSenderAddress;
+  private final String outgoingEmailAddress;
   private final String alertRecipientAddress;
   private final ImmutableList<String> invoiceEmailRecipients;
   private final String billingBucket;
@@ -56,7 +56,7 @@ class BillingEmailUtils {
   BillingEmailUtils(
       SendEmailService emailService,
       YearMonth yearMonth,
-      @Config("alertSenderEmailAddress") String alertSenderAddress,
+      @Config("gSuiteOutgoingEmailAddress") String outgoingEmailAddress,
       @Config("alertRecipientEmailAddress") String alertRecipientAddress,
       @Config("invoiceEmailRecipients") ImmutableList<String> invoiceEmailRecipients,
       @Config("billingBucket") String billingBucket,
@@ -65,7 +65,7 @@ class BillingEmailUtils {
       Retrier retrier) {
     this.emailService = emailService;
     this.yearMonth = yearMonth;
-    this.alertSenderAddress = alertSenderAddress;
+    this.outgoingEmailAddress = outgoingEmailAddress;
     this.alertRecipientAddress = alertRecipientAddress;
     this.invoiceEmailRecipients = invoiceEmailRecipients;
     this.billingBucket = billingBucket;
@@ -86,7 +86,7 @@ class BillingEmailUtils {
                 new GcsFilename(billingBucket, invoiceDirectoryPrefix + invoiceFile);
             try (InputStream in = gcsUtils.openInputStream(invoiceFilename)) {
               Message msg = emailService.createMessage();
-              msg.setFrom(new InternetAddress(alertSenderAddress));
+              msg.setFrom(new InternetAddress(outgoingEmailAddress));
               for (String recipient : invoiceEmailRecipients) {
                 msg.addRecipient(RecipientType.TO, new InternetAddress(recipient));
               }
@@ -126,7 +126,7 @@ class BillingEmailUtils {
       retrier.callWithRetry(
           () -> {
             Message msg = emailService.createMessage();
-            msg.setFrom(new InternetAddress(alertSenderAddress));
+            msg.setFrom(new InternetAddress(outgoingEmailAddress));
             msg.addRecipient(RecipientType.TO, new InternetAddress(alertRecipientAddress));
             msg.setSubject(String.format("Billing Pipeline Alert: %s", yearMonth.toString()));
             msg.setText(body);
diff --git a/java/google/registry/reporting/icann/ReportingEmailUtils.java b/java/google/registry/reporting/icann/ReportingEmailUtils.java
index 9b248f94d..c011b8bfa 100644
--- a/java/google/registry/reporting/icann/ReportingEmailUtils.java
+++ b/java/google/registry/reporting/icann/ReportingEmailUtils.java
@@ -25,7 +25,7 @@ import javax.mail.internet.InternetAddress;
 /** Static utils for emailing reporting results. */
 public class ReportingEmailUtils {
 
-  @Inject @Config("alertSenderEmailAddress") String sender;
+  @Inject @Config("gSuiteOutgoingEmailAddress") String sender;
   @Inject @Config("alertRecipientEmailAddress") String recipient;
   @Inject SendEmailService emailService;
   @Inject ReportingEmailUtils() {}
diff --git a/java/google/registry/reporting/spec11/Spec11EmailUtils.java b/java/google/registry/reporting/spec11/Spec11EmailUtils.java
index 76b716446..c29e2003b 100644
--- a/java/google/registry/reporting/spec11/Spec11EmailUtils.java
+++ b/java/google/registry/reporting/spec11/Spec11EmailUtils.java
@@ -45,7 +45,7 @@ public class Spec11EmailUtils {
 
   private final SendEmailService emailService;
   private final YearMonth yearMonth;
-  private final String alertSenderAddress;
+  private final String outgoingEmailAddress;
   private final String alertRecipientAddress;
   private final String spec11ReplyToAddress;
   private final String reportingBucket;
@@ -58,7 +58,7 @@ public class Spec11EmailUtils {
   Spec11EmailUtils(
       SendEmailService emailService,
       YearMonth yearMonth,
-      @Config("alertSenderEmailAddress") String alertSenderAddress,
+      @Config("gSuiteOutgoingEmailAddress") String outgoingEmailAddress,
       @Config("alertRecipientEmailAddress") String alertRecipientAddress,
       @Config("spec11ReplyToEmailAddress") String spec11ReplyToAddress,
       @Config("spec11EmailBodyTemplate") String spec11EmailBodyTemplate,
@@ -68,7 +68,7 @@ public class Spec11EmailUtils {
       Retrier retrier) {
     this.emailService = emailService;
     this.yearMonth = yearMonth;
-    this.alertSenderAddress = alertSenderAddress;
+    this.outgoingEmailAddress = outgoingEmailAddress;
     this.alertRecipientAddress = alertRecipientAddress;
     this.spec11ReplyToAddress = spec11ReplyToAddress;
     this.reportingBucket = reportingBucket;
@@ -135,7 +135,7 @@ public class Spec11EmailUtils {
     msg.setSubject(
         String.format("Google Registry Monthly Threat Detector [%s]", yearMonth.toString()));
     msg.setText(body.toString());
-    msg.setFrom(new InternetAddress(alertSenderAddress));
+    msg.setFrom(new InternetAddress(outgoingEmailAddress));
     msg.addRecipient(RecipientType.TO, new InternetAddress(registrarEmail));
     msg.addRecipient(RecipientType.BCC, new InternetAddress(spec11ReplyToAddress));
     emailService.sendMessage(msg);
@@ -147,7 +147,7 @@ public class Spec11EmailUtils {
       retrier.callWithRetry(
           () -> {
             Message msg = emailService.createMessage();
-            msg.setFrom(new InternetAddress(alertSenderAddress));
+            msg.setFrom(new InternetAddress(outgoingEmailAddress));
             msg.addRecipient(RecipientType.TO, new InternetAddress(alertRecipientAddress));
             msg.setSubject(subject);
             msg.setText(body);