[Dovecot] Quota notifications: Allow to send to external address (BCC via mailcow UI)

data/Dockerfiles/dovecot/quota_notify.py

@@ -9,6 +9,7 @@ import jinja2
 from jinja2 import Template
 import redis
 import time
+import json
 import sys
 import html2text
 from subprocess import Popen, PIPE, STDOUT
@@ -57,6 +58,27 @@ try:
   p = Popen(['/usr/lib/dovecot/dovecot-lda', '-d', username, '-o', '"plugin/quota=maildir:User quota:noenforcing"'], stdout=PIPE, stdin=PIPE, stderr=STDOUT)
   p.communicate(input=bytes(msg.as_string(), 'utf-8'))
 
+  domain = username.split("@")[-1]
+  if domain and r.hget('QW_BCC', domain):
+    bcc_data = json.loads(r.hget('QW_BCC', domain))
+    bcc_rcpts = bcc_data['bcc_rcpts']
+    if bcc_data['active'] == 1:
+      for rcpt in bcc_rcpts:
+        msg = MIMEMultipart('alternative')
+        msg['From'] = username
+        subject = r.get('QW_SUBJ') or "Quota warning"
+        msg['Subject'] = subject + ' (' + username + ')'
+        msg['Date'] = formatdate(localtime = True)
+        text_part = MIMEText(text, 'plain', 'utf-8')
+        html_part = MIMEText(html, 'html', 'utf-8')
+        msg.attach(text_part)
+        msg.attach(html_part)
+        msg['To'] = rcpt
+        server = smtplib.SMTP('postfix', 588, 'quarantine')
+        server.ehlo()
+        server.sendmail(msg['From'], str(rcpt), msg.as_string())
+        server.quit()
+
 except Exception as ex:
   print('Failed to send quota notification: %s' % (ex))
   sys.exit(1)
@@ -69,4 +91,4 @@ except:
 try:
   sys.stderr.close()
 except:
-  pass
+  pass