diff --git a/patchwork/forge/github/__init__.py b/patchwork/forge/github/__init__.py
index ded7402cd5f3..4441c2b11ab0 100644
--- a/patchwork/forge/github/__init__.py
+++ b/patchwork/forge/github/__init__.py
@@ -14,8 +14,12 @@ import logging
 
 from patchwork.forge import ForgeBackend
 from patchwork.forge import register_backend
+from patchwork.forge.github.to_ml import handle_issue_comment
 from patchwork.forge.github.to_ml import handle_pull_request
+from patchwork.forge.github.to_ml import handle_review
+from patchwork.forge.github.webhook import parse_issue_comment
 from patchwork.forge.github.webhook import parse_pull_request
+from patchwork.forge.github.webhook import parse_review
 
 logger = logging.getLogger(__name__)
 
@@ -40,7 +44,9 @@ class GitHubBackend(ForgeBackend):
         payload = json.loads(body)
 
         parsers = {
+            'issue_comment': parse_issue_comment,
             'pull_request': parse_pull_request,
+            'pull_request_review': parse_review,
         }
 
         parser = parsers.get(event_type)
@@ -73,7 +79,9 @@ class GitHubBackend(ForgeBackend):
 
     def process_webhook_event(self, forge_config, event):
         handlers = {
+            'issue_comment': handle_issue_comment,
             'pull_request': handle_pull_request,
+            'review': handle_review,
         }
         handler = handlers.get(event.type)
         if handler:
diff --git a/patchwork/forge/github/to_ml.py b/patchwork/forge/github/to_ml.py
index fac07b180a51..bfb4f3d42691 100644
--- a/patchwork/forge/github/to_ml.py
+++ b/patchwork/forge/github/to_ml.py
@@ -3,11 +3,20 @@
 #
 # SPDX-License-Identifier: GPL-2.0-or-later
 
+import email
+import logging
+
 from patchwork.forge.git import GitMirror
+from patchwork.forge.util import bytes_to_mbox
+from patchwork.forge.util import find_series_by_pr
 from patchwork.forge.util import ingest_emails
 from patchwork.forge.util import next_version
+from patchwork.forge.util import reply_to_msgid
 from patchwork.forge.util import sanitize_pr_body
 from patchwork.forge.util import send_emails
+from patchwork.forge.util import sender_identity
+
+logger = logging.getLogger(__name__)
 
 
 def handle_pull_request(gh, forge_config, event):
@@ -52,3 +61,71 @@ def handle_pull_request(gh, forge_config, event):
 
     ingest_emails(mbox, gh, forge_config, event)
     send_emails(mbox, forge_config)
+
+
+def handle_issue_comment(gh, forge_config, event):
+    series = find_series_by_pr(gh, forge_config, event.pr_number).last()
+    if not series:
+        logger.warning('no series found for PR #%d', event.pr_number)
+        return
+
+    subject = f'Re: {series.name} (comment)'
+    reply(gh, forge_config, event, series, subject, event.body)
+
+
+def handle_review(gh, forge_config, event):
+    series = find_series_by_pr(gh, forge_config, event.pr_number).last()
+    if not series:
+        logger.warning('no series found for PR #%d', event.pr_number)
+        return
+    subject = f'Re: {series.name} (review: {event.review_state})'
+
+    body = ''
+    if event.review_state:
+        body = f'Review: {event.review_state}\n\n'
+    if event.body:
+        body += f'{event.body}\n\n'
+    for c in event.review_comments:
+        body += f'--- {c.path}\n'
+        if c.diff_hunk:
+            for line in c.diff_hunk.split('\n'):
+                body += f'> {line}\n'
+            body += '\n'
+        body += f'{c.body}\n\n'
+
+    reply(gh, forge_config, event, series, subject, body.rstrip())
+
+
+def reply(gh, forge_config, event, series, subject, body):
+    """
+    Build a reply email as an mbox, ingest it into the database and
+    send it to the mailing list.
+    """
+    in_reply_to = reply_to_msgid(series)
+    if not in_reply_to:
+        logger.warning('no message-id for series %d', series.id)
+        return
+
+    _, addr = email.utils.parseaddr(forge_config.sender_addr)
+    uid, domain = addr.rsplit('@', 1)
+
+    msg = email.mime.text.MIMEText(body)
+    msg['From'] = email.utils.formataddr(
+        sender_identity(event.author, forge_config)
+    )
+    msg['Sender'] = email.utils.formataddr(
+        email.utils.parseaddr(forge_config.sender_addr)
+    )
+    msg['To'] = forge_config.project.listemail
+    msg['Subject'] = email.header.Header(subject, 'utf-8')
+    msg['Date'] = email.utils.formatdate(localtime=True)
+    msg['Message-ID'] = email.utils.make_msgid(uid, domain)
+    msg['In-Reply-To'] = in_reply_to
+    msg['References'] = in_reply_to
+    msg['Reply-To'] = forge_config.project.listemail
+    msg['List-ID'] = f'<{forge_config.project.listid}>'
+    msg['X-Patchwork-Hint'] = 'ignore'
+
+    mbox = bytes_to_mbox(msg.as_bytes(unixfrom=True))
+    ingest_emails(mbox, gh, forge_config, event)
+    send_emails(mbox, forge_config)
diff --git a/patchwork/forge/github/webhook.py b/patchwork/forge/github/webhook.py
index f85cc5db1ddf..5ae0f5f12b60 100644
--- a/patchwork/forge/github/webhook.py
+++ b/patchwork/forge/github/webhook.py
@@ -5,6 +5,7 @@
 
 from patchwork.forge import ForgeEvent
 from patchwork.forge import ForgeUser
+from patchwork.forge import ReviewComment
 
 
 def parse_pull_request(payload):
@@ -40,3 +41,44 @@ def parse_user(user):
         name=user.get('name', ''),
         email=user.get('email', ''),
     )
+
+
+def parse_issue_comment(payload):
+    if payload.get('action') != 'created':
+        return None
+    issue = payload.get('issue', {})
+    if 'pull_request' not in issue:
+        return None
+    comment = payload.get('comment', {})
+    return ForgeEvent(
+        type='issue_comment',
+        repo_key=get_repo_key(payload),
+        pr_number=issue.get('number', 0),
+        author=parse_user(comment.get('user')),
+        body=comment.get('body', ''),
+    )
+
+
+def parse_review(self, payload):
+    if payload.get('action') != 'submitted':
+        return None
+    review = payload.get('review', {})
+    pr = payload.get('pull_request', {})
+    comments = []
+    for c in review.get('comments', []):
+        comments.append(
+            ReviewComment(
+                path=c.get('path', ''),
+                diff_hunk=c.get('diff_hunk', ''),
+                body=c.get('body', ''),
+            )
+        )
+    return ForgeEvent(
+        type='review',
+        repo_key=get_repo_key(payload),
+        pr_number=pr.get('number', 0),
+        author=parse_user(review.get('user')),
+        body=review.get('body', ''),
+        review_state=review.get('state', ''),
+        review_comments=comments,
+    )