diff --git a/weboob/backends/phpbb/backend.py b/weboob/backends/phpbb/backend.py
index e77c7e6e..c1279aa9 100644
--- a/weboob/backends/phpbb/backend.py
+++ b/weboob/backends/phpbb/backend.py
@@ -24,7 +24,7 @@ from weboob.tools.backend import BaseBackend, BackendConfig
 from weboob.tools.newsfeed import Newsfeed
 from weboob.tools.value import Value, ValueInt, ValueBackendPassword
 from weboob.tools.misc import limit
-from weboob.capabilities.messages import ICapMessages, ICapMessagesPost, Message, Thread, CantSendMessage
+from weboob.capabilities.messages import ICapMessages, ICapMessagesPost, Message, Thread
 
 from .browser import PhpBB
 from .tools import rssid, url2id, id2url
@@ -33,7 +33,7 @@ from .tools import rssid, url2id, id2url
 __all__ = ['PhpBBBackend']
 
 
-class PhpBBBackend(BaseBackend, ICapMessages):
+class PhpBBBackend(BaseBackend, ICapMessages, ICapMessagesPost):
     NAME = 'phpbb'
     MAINTAINER = 'Romain Bignon'
     EMAIL = 'romain@weboob.org'
@@ -179,7 +179,7 @@ class PhpBBBackend(BaseBackend, ICapMessages):
         assert message.thread
 
         with self.browser:
-            return self.browser.post_answer(message.thread.id,
+            return self.browser.post_answer(message.thread.id if message.thread else 0,
                                             message.title,
                                             message.content)
 
diff --git a/weboob/backends/phpbb/browser.py b/weboob/backends/phpbb/browser.py
index 4d8139d0..5fcaf341 100644
--- a/weboob/backends/phpbb/browser.py
+++ b/weboob/backends/phpbb/browser.py
@@ -25,7 +25,7 @@ from weboob.tools.browser import BaseBrowser, BrowserIncorrectPassword
 from weboob.capabilities.messages import CantSendMessage
 
 from .pages.index import LoginPage
-from .pages.forum import ForumPage, TopicPage
+from .pages.forum import ForumPage, TopicPage, PostingPage
 from .tools import id2url, url2id
 
 # Browser
@@ -35,6 +35,7 @@ class PhpBB(BaseBrowser):
              'https?://.*/viewforum.php\?f=(\d+)':    ForumPage,
              'https?://.*/search.php\?.*':            ForumPage,
              'https?://.*/viewtopic.php\?.*':         TopicPage,
+             'https?://.*/posting.php\?.*':           PostingPage,
              'https?://.*/ucp.php\?mode=login.*':     LoginPage,
             }
 
@@ -92,7 +93,7 @@ class PhpBB(BaseBrowser):
         parent = 0
         while 1:
             for post in self.page.iter_posts():
-                if post.id == stop_id:
+                if post.id >= stop_id:
                     return
 
                 post.parent = parent
@@ -116,7 +117,7 @@ class PhpBB(BaseBrowser):
                 if child:
                     child.parent = post.id
                     yield child
-                if post.id == stop_id:
+                if post.id <= stop_id:
                     return
                 child = post
 
@@ -145,4 +146,18 @@ class PhpBB(BaseBrowser):
         return post
 
     def post_answer(self, topic, title, content):
-        pass
+        if topic == 0:
+            raise CantSendMessage('Unable to create new topic for now')
+        else:
+            self.location('%s/%s' % (self.BASEPATH, id2url(topic)))
+            assert self.is_on_page(TopicPage)
+
+            self.page.go_reply()
+            assert self.is_on_page(PostingPage)
+
+            self.page.post(title, content)
+
+            assert self.is_on_page(PostingPage)
+            error = self.page.get_error_message()
+            if error:
+                raise CantSendMessage('Unable to send message: %s' % error)
diff --git a/weboob/backends/phpbb/pages/forum.py b/weboob/backends/phpbb/pages/forum.py
index ab55f9c1..f6e952ac 100644
--- a/weboob/backends/phpbb/pages/forum.py
+++ b/weboob/backends/phpbb/pages/forum.py
@@ -26,7 +26,7 @@ from .index import PhpBBPage
 from ..tools import parse_date
 
 
-__all__ = ['Link', 'ForumPage', 'TopicPage']
+__all__ = ['Link', 'ForumPage', 'TopicPage', 'PostingPage']
 
 
 class Link(object):
@@ -96,6 +96,9 @@ class TopicPage(PhpBBPage):
                 text = text[:20] + u'…'
             self.forum_title = '[%s] ' % text
 
+    def go_reply(self):
+        self.browser.follow_link(url_regex='posting\.php')
+
     def next_page_url(self):
         try:
             return self.parser.select(self.document.getroot(), 'a.right-box', 1).attrib['href']
@@ -186,3 +189,22 @@ class TopicPage(PhpBBPage):
             id = int(div.attrib['id'][1:])
         return id
 
+
+class PostingPage(PhpBBPage):
+    def post(self, title, content):
+        self.browser.select_form(predicate=lambda form: form.attrs.get('id', '') == 'postform')
+        self.browser.set_all_readonly(False)
+        if title:
+            self.browser['subject'] = title.encode('utf-8')
+        self.browser['message'] = content.encode('utf-8')
+
+        # This code on phpbb:
+        #   if ($cancel || ($current_time - $lastclick < 2 && $submit))
+        #   {
+        #       /* ... */
+        #       redirect($redirect);
+        #   }
+        # To prevent that shit because weboob is too fast, we simulate
+        # a value of lastclick 10 seconds before.
+        self.browser['lastclick'] = str(int(self.browser['lastclick']) - 10)
+        self.browser.submit(name='post')
diff --git a/weboob/backends/phpbb/pages/index.py b/weboob/backends/phpbb/pages/index.py
index f17e4efb..46ad3b7a 100644
--- a/weboob/backends/phpbb/pages/index.py
+++ b/weboob/backends/phpbb/pages/index.py
@@ -28,10 +28,12 @@ class PhpBBPage(BasePage):
         links = self.document.getroot().cssselect('link[type="application/atom+xml"]')
         return links[-1].attrib['href']
 
-class LoginPage(PhpBBPage):
     def get_error_message(self):
         errors = []
-        for div in self.parser.select(self.document.getroot(), 'div.error'):
+        for div in self.parser.select(self.document.getroot(), 'div.error,p.error'):
             if div.text:
                 errors.append(div.text.strip())
         return ', '.join(errors)
+
+class LoginPage(PhpBBPage):
+    pass