Always send message delivery receipts requests

- We want to send requests also to offline contacts.
- The XEP is wide spread chances are high that a contact supports it.
- It gets really complicated, when we want to guess if a offline contact supports receipts

src/chat_control.py

@@ -49,7 +49,7 @@ from common.stanza_session import EncryptedStanzaSession, ArchivingStanzaSession
 from common.contacts import GC_Contact
 from common.logger import KindConstant
 from nbxmpp.protocol import NS_XHTML, NS_XHTML_IM, NS_FILE, NS_MUC
-from nbxmpp.protocol import NS_RECEIPTS, NS_ESESSION
+from nbxmpp.protocol import NS_ESESSION
 from nbxmpp.protocol import NS_JINGLE_RTP_AUDIO, NS_JINGLE_RTP_VIDEO
 from nbxmpp.protocol import NS_JINGLE_ICE_UDP, NS_JINGLE_FILE_TRANSFER
 from nbxmpp.protocol import NS_CHATSTATES
@@ -980,8 +980,7 @@ class ChatControl(ChatControlBase):
             id_ = msg_stanza.getID()
             xep0184_id = None
             if self.contact.jid != gajim.get_jid_from_account(self.account):
-                if self.contact.supports(NS_RECEIPTS) and gajim.config.get_per(
-                'accounts', self.account, 'request_receipt'):
+                if gajim.config.get_per('accounts', self.account, 'request_receipt'):
                     xep0184_id = id_
             if label:
                 displaymarking = label.getTag('displaymarking')

src/common/caps_cache.py

@@ -37,11 +37,11 @@ import hashlib
 import logging
 log = logging.getLogger('gajim.c.caps_cache')
 
-from nbxmpp import (NS_XHTML_IM, NS_RECEIPTS, NS_ESESSION, NS_CHATSTATES,
+from nbxmpp import (NS_XHTML_IM, NS_ESESSION, NS_CHATSTATES,
     NS_JINGLE_ICE_UDP, NS_JINGLE_RTP_AUDIO, NS_JINGLE_RTP_VIDEO,
     NS_JINGLE_FILE_TRANSFER)
 # Features where we cannot safely assume that the other side supports them
-FEATURE_BLACKLIST = [NS_CHATSTATES, NS_XHTML_IM, NS_RECEIPTS, NS_ESESSION,
+FEATURE_BLACKLIST = [NS_CHATSTATES, NS_XHTML_IM, NS_ESESSION,
     NS_JINGLE_ICE_UDP, NS_JINGLE_RTP_AUDIO, NS_JINGLE_RTP_VIDEO,
     NS_JINGLE_FILE_TRANSFER]
 

src/common/connection.py

@@ -469,8 +469,7 @@ class CommonConnection:
             # XEP-0184
             if obj.jid != gajim.get_jid_from_account(self.name):
                 if msgtxt and gajim.config.get_per('accounts', self.name,
-                'request_receipt') and contact and contact.supports(
-                nbxmpp.NS_RECEIPTS):
+                'request_receipt'):
                     msg_iq.setTag('request', namespace=nbxmpp.NS_RECEIPTS)
 
             if obj.forward_from: