Simple plugin for kopano-dagent that rewrites incoming addresses to the 'SMTP' type. https://notabug.org/hp/kopano-dagent-rewritegaladdresses
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# kopano-dagent RewriteGALAddressesToSMTP
# (c) 2017 Hein-Pieter van Braam <hp@tmm.cx>
# (C) 2020 Christoph Haas <christoph.h@sprinternet.at>
# Licensed under the GPU Affero GPL v3 (or at your option any later version)
# See LICENSE file for details
import MAPI
import email
from email.utils import getaddresses
from email.header import decode_header
from MAPI.Util import *
from plugintemplates import *
class RewriteGALAddressesToSMTP(IMapiDAgentPlugin):
def __init__(self, logger):
IMapiDAgentPlugin.__init__(self, logger)
def DecodeHeaderToUTF8(self, header) -> str:
decodedHeaderParts = decode_header(header)
strHeader = ""
for headerText, headerEncoding in decodedHeaderParts:
if headerEncoding is None:
if isinstance(headerText, str):
strHeader += headerText # already a string
else:
strHeader += headerText.decode('ASCII')
else:
strHeader += headerText.decode(headerEncoding)
return strHeader
def GetKopanoRecipient(self, emailAddr: bytes, kopanoRecipients: list) -> list:
for rcpt in kopanoRecipients:
if SPropValue(PR_EMAIL_ADDRESS, emailAddr) in rcpt:
return rcpt
return None
# PreDelivery hook entry point
def PreDelivery(self, session, addrbook, store, folder, message):
# Load headers and extract To: and CC: headers
headers = message.GetProps([PR_TRANSPORT_MESSAGE_HEADERS], 0)[0].Value
msg = email.message_from_bytes(headers)
to_addrs = getaddresses(msg.get_all('to', []))
cc_addrs = getaddresses(msg.get_all('cc', []))
# First load all original recipients for the message
orig_to_addrs = []
orig_cc_addrs = []
rcptTable = message.GetRecipientTable(0)
#rcptTable.SetColumns([PR_EMAIL_ADDRESS, PR_ADDRTYPE], 0) # no specific columns means: load all columns
origRcpts = rcptTable.QueryRows(10, 0)
while origRcpts and len(origRcpts) > 0:
for origRcpt in origRcpts:
if SPropValue(PR_RECIPIENT_TYPE, MAPI_TO) in origRcpt:
orig_to_addrs.append(origRcpt)
if SPropValue(PR_RECIPIENT_TYPE, MAPI_CC) in origRcpt:
orig_cc_addrs.append(origRcpt)
origRcpts = rcptTable.QueryRows(10, 0) # Read the next 10 recipients
# Now replace alias addresses with the SMTP address type
names = []
for addr in to_addrs:
kopanoRcpt = self.GetKopanoRecipient(bytes(addr[1], encoding='utf8'), orig_to_addrs)
if kopanoRcpt is not None:
names.append(kopanoRcpt) # keep original To: entry
else:
names.append([
SPropValue(PR_RECIPIENT_TYPE, MAPI_TO),
SPropValue(PR_DISPLAY_NAME, bytes(self.DecodeHeaderToUTF8(addr[0]), encoding="utf8")),
SPropValue(PR_ADDRTYPE, bytes('SMTP', encoding="utf8")),
SPropValue(PR_EMAIL_ADDRESS, bytes(addr[1], encoding='utf8')),
])
for addr in cc_addrs:
kopanoRcpt = self.GetKopanoRecipient(bytes(addr[1], encoding='utf8'), orig_cc_addrs)
if kopanoRcpt is not None:
names.append(kopanoRcpt) # keep original CC: entry
else:
names.append([
SPropValue(PR_RECIPIENT_TYPE, MAPI_CC),
SPropValue(PR_DISPLAY_NAME, bytes(self.DecodeHeaderToUTF8(addr[0]), encoding="utf8")),
SPropValue(PR_ADDRTYPE, bytes('SMTP', encoding="utf8")),
SPropValue(PR_EMAIL_ADDRESS, bytes(addr[1], encoding='utf8')),
])
if len(names) > 0: # double check, avoid empty recipients
message.ModifyRecipients(0, names)
return MP_CONTINUE,