diff --git a/announce.py b/announce.py
index 098cb8820..97c9d4fb1 100644
--- a/announce.py
+++ b/announce.py
@@ -253,7 +253,8 @@ def sendAnnounceViaServer(baseDir: str, session,
         'Content-type': 'application/json',
         'Authorization': authHeader
     }
-    postResult = postJson(session, newAnnounceJson, [], inboxUrl,
+    postResult = postJson(httpPrefix, fromDomainFull,
+                          session, newAnnounceJson, [], inboxUrl,
                           headers, 3, True)
     if not postResult:
         print('WARN: announce not posted')
@@ -332,7 +333,8 @@ def sendUndoAnnounceViaServer(baseDir: str, session,
         'Content-type': 'application/json',
         'Authorization': authHeader
     }
-    postResult = postJson(session, unAnnounceJson, [], inboxUrl,
+    postResult = postJson(httpPrefix, domainFull,
+                          session, unAnnounceJson, [], inboxUrl,
                           headers, 3, True)
     if not postResult:
         print('WARN: undo announce not posted')
diff --git a/availability.py b/availability.py
index 441b01264..9df2173bd 100644
--- a/availability.py
+++ b/availability.py
@@ -143,7 +143,8 @@ def sendAvailabilityViaServer(baseDir: str, session,
         'Content-type': 'application/json',
         'Authorization': authHeader
     }
-    postResult = postJson(session, newAvailabilityJson, [],
+    postResult = postJson(httpPrefix, domainFull,
+                          session, newAvailabilityJson, [],
                           inboxUrl, headers, 30, True)
     if not postResult:
         print('WARN: availability failed to post')
diff --git a/bookmarks.py b/bookmarks.py
index 04a68052b..58a772b3d 100644
--- a/bookmarks.py
+++ b/bookmarks.py
@@ -418,7 +418,8 @@ def sendBookmarkViaServer(baseDir: str, session,
         'Content-type': 'application/json',
         'Authorization': authHeader
     }
-    postResult = postJson(session, newBookmarkJson, [], inboxUrl,
+    postResult = postJson(httpPrefix, domainFull,
+                          session, newBookmarkJson, [], inboxUrl,
                           headers, 3, True)
     if not postResult:
         if debug:
@@ -502,7 +503,8 @@ def sendUndoBookmarkViaServer(baseDir: str, session,
         'Content-type': 'application/json',
         'Authorization': authHeader
     }
-    postResult = postJson(session, newBookmarkJson, [], inboxUrl,
+    postResult = postJson(httpPrefix, domainFull,
+                          session, newBookmarkJson, [], inboxUrl,
                           headers, 3, True)
     if not postResult:
         if debug:
diff --git a/delete.py b/delete.py
index 0566015d6..05ceb051d 100644
--- a/delete.py
+++ b/delete.py
@@ -93,7 +93,8 @@ def sendDeleteViaServer(baseDir: str, session,
         'Authorization': authHeader
     }
     postResult = \
-        postJson(session, newDeleteJson, [], inboxUrl, headers, 3, True)
+        postJson(httpPrefix, fromDomainFull,
+                 session, newDeleteJson, [], inboxUrl, headers, 3, True)
     if not postResult:
         if debug:
             print('DEBUG: POST delete failed for c2s to ' + inboxUrl)
diff --git a/follow.py b/follow.py
index 0b1ecbc4d..f7a48ed10 100644
--- a/follow.py
+++ b/follow.py
@@ -1029,7 +1029,8 @@ def sendFollowRequestViaServer(baseDir: str, session,
         'Authorization': authHeader
     }
     postResult = \
-        postJson(session, newFollowJson, [], inboxUrl, headers, 3, True)
+        postJson(httpPrefix, fromDomainFull,
+                 session, newFollowJson, [], inboxUrl, headers, 3, True)
     if not postResult:
         if debug:
             print('DEBUG: POST follow request failed for c2s to ' + inboxUrl)
@@ -1122,7 +1123,8 @@ def sendUnfollowRequestViaServer(baseDir: str, session,
         'Authorization': authHeader
     }
     postResult = \
-        postJson(session, unfollowJson, [], inboxUrl, headers, 3, True)
+        postJson(httpPrefix, fromDomainFull,
+                 session, unfollowJson, [], inboxUrl, headers, 3, True)
     if not postResult:
         if debug:
             print('DEBUG: POST unfollow failed for c2s to ' + inboxUrl)
diff --git a/like.py b/like.py
index 646913043..7e5d51374 100644
--- a/like.py
+++ b/like.py
@@ -205,7 +205,8 @@ def sendLikeViaServer(baseDir: str, session,
         'Content-type': 'application/json',
         'Authorization': authHeader
     }
-    postResult = postJson(session, newLikeJson, [], inboxUrl,
+    postResult = postJson(httpPrefix, fromDomainFull,
+                          session, newLikeJson, [], inboxUrl,
                           headers, 3, True)
     if not postResult:
         if debug:
@@ -287,7 +288,8 @@ def sendUndoLikeViaServer(baseDir: str, session,
         'Content-type': 'application/json',
         'Authorization': authHeader
     }
-    postResult = postJson(session, newUndoLikeJson, [], inboxUrl,
+    postResult = postJson(httpPrefix, fromDomainFull,
+                          session, newUndoLikeJson, [], inboxUrl,
                           headers, 3, True)
     if not postResult:
         if debug:
diff --git a/pgp.py b/pgp.py
index b32958603..619bad3d5 100644
--- a/pgp.py
+++ b/pgp.py
@@ -588,7 +588,8 @@ def pgpPublicKeyUpload(baseDir: str, session,
     tries = 0
     while tries < 4:
         postResult = \
-            postJson(session, actorUpdate, [], inboxUrl,
+            postJson(httpPrefix, domainFull,
+                     session, actorUpdate, [], inboxUrl,
                      headers, 5, quiet)
         if postResult:
             break
diff --git a/posts.py b/posts.py
index 862705234..6e275d45f 100644
--- a/posts.py
+++ b/posts.py
@@ -4198,7 +4198,8 @@ def sendBlockViaServer(baseDir: str, session,
         'Content-type': 'application/json',
         'Authorization': authHeader
     }
-    postResult = postJson(session, newBlockJson, [], inboxUrl,
+    postResult = postJson(httpPrefix, fromDomainFull,
+                          session, newBlockJson, [], inboxUrl,
                           headers, 30, True)
     if not postResult:
         print('WARN: block unable to post')
@@ -4273,7 +4274,8 @@ def sendMuteViaServer(baseDir: str, session,
         'Content-type': 'application/json',
         'Authorization': authHeader
     }
-    postResult = postJson(session, newMuteJson, [], inboxUrl,
+    postResult = postJson(httpPrefix, fromDomainFull,
+                          session, newMuteJson, [], inboxUrl,
                           headers, 3, True)
     if postResult is None:
         print('WARN: mute unable to post')
@@ -4354,7 +4356,8 @@ def sendUndoMuteViaServer(baseDir: str, session,
         'Content-type': 'application/json',
         'Authorization': authHeader
     }
-    postResult = postJson(session, undoMuteJson, [], inboxUrl,
+    postResult = postJson(httpPrefix, fromDomainFull,
+                          session, undoMuteJson, [], inboxUrl,
                           headers, 3, True)
     if postResult is None:
         print('WARN: undo mute unable to post')
@@ -4438,7 +4441,8 @@ def sendUndoBlockViaServer(baseDir: str, session,
         'Content-type': 'application/json',
         'Authorization': authHeader
     }
-    postResult = postJson(session, newBlockJson, [], inboxUrl,
+    postResult = postJson(httpPrefix, fromDomainFull,
+                          session, newBlockJson, [], inboxUrl,
                           headers, 30, True)
     if not postResult:
         print('WARN: unblock unable to post')
diff --git a/session.py b/session.py
index 0c4de0b39..f6ccfbb3a 100644
--- a/session.py
+++ b/session.py
@@ -149,7 +149,8 @@ def getJson(session, url: str, headers: {}, params: {}, debug: bool,
     return None
 
 
-def postJson(session, postJsonObject: {}, federationList: [],
+def postJson(httpPrefix: str, domainFull: str,
+             session, postJsonObject: {}, federationList: [],
              inboxUrl: str, headers: {}, timeoutSec: int = 60,
              quiet: bool = False) -> str:
     """Post a json message to the inbox of another person
@@ -160,6 +161,11 @@ def postJson(session, postJsonObject: {}, federationList: [],
             print('postJson: ' + inboxUrl + ' not permitted')
         return None
 
+    sessionHeaders = headers
+    sessionHeaders['User-Agent'] = 'Epicyon/' + __version__
+    sessionHeaders['User-Agent'] += \
+        '; +' + httpPrefix + '://' + domainFull + '/'
+
     try:
         postResult = \
             session.post(url=inboxUrl,
diff --git a/shares.py b/shares.py
index 467209750..4fb62daad 100644
--- a/shares.py
+++ b/shares.py
@@ -410,7 +410,8 @@ def sendShareViaServer(baseDir, session,
         'Authorization': authHeader
     }
     postResult = \
-        postJson(session, newShareJson, [], inboxUrl, headers, 30, True)
+        postJson(httpPrefix, fromDomainFull,
+                 session, newShareJson, [], inboxUrl, headers, 30, True)
     if not postResult:
         if debug:
             print('DEBUG: POST share failed for c2s to ' + inboxUrl)
@@ -500,7 +501,8 @@ def sendUndoShareViaServer(baseDir: str, session,
         'Authorization': authHeader
     }
     postResult = \
-        postJson(session, undoShareJson, [], inboxUrl,
+        postJson(httpPrefix, fromDomainFull,
+                 session, undoShareJson, [], inboxUrl,
                  headers, 30, True)
     if not postResult:
         if debug:
diff --git a/skills.py b/skills.py
index d2e8a8306..dae7d567b 100644
--- a/skills.py
+++ b/skills.py
@@ -246,7 +246,8 @@ def sendSkillViaServer(baseDir: str, session, nickname: str, password: str,
         'Authorization': authHeader
     }
     postResult = \
-        postJson(session, newSkillJson, [], inboxUrl,
+        postJson(httpPrefix, domainFull,
+                 session, newSkillJson, [], inboxUrl,
                  headers, 30, True)
     if not postResult:
         if debug: