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3 changed files with 16 additions and 18 deletions

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@ -22,11 +22,11 @@ gpg: # optional
enabled: true enabled: true
absent_notice: absent_notice:
enabled: true # Wether to issue a notice if recipient does not use GPG (PGP) enabled: true # Wether to issue a notice if recipient does not use GPG (PGP)
text: "\n\n⚠️ This email was sent without end-to-end encryption.\n text: "\n\nNote: This email was sent without end-to-end encryption.\n
This mail server supports automatic PGP encryption.\n This mail server supports automatic PGP encryption.\n
Consider setting up a PGP key and publishing it to keys.openpgp.org." Consider setting up a PGP key and publishing it to keys.openpgp.org."
html: html:
"<p><strong>⚠️ This email was sent without end-to-end encryption.</strong><br> "<p><strong>Note: This email was sent without end-to-end encryption.</strong><br>
This mail server supports automatic PGP encryption.<br> This mail server supports automatic PGP encryption.<br>
Consider setting up a PGP key and publishing it to keys.openpgp.org.</p>" Consider setting up a PGP key and publishing it to keys.openpgp.org.</p>"
# either text, html or both # either text, html or both

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@ -217,9 +217,9 @@ def get_conf(param: str):
elif param == "WARN_ABSENT_GPG": elif param == "WARN_ABSENT_GPG":
return config["gpg"]["absent_notice"]["enabled"] if get_conf("GPG_ENABLED") else False return config["gpg"]["absent_notice"]["enabled"] if get_conf("GPG_ENABLED") else False
elif param == "GPG_ABSENT_NOTICE_TEXT": elif param == "GPG_ABSENT_NOTICE_TEXT":
return config["gpg"]["absent_notice"]["text"] if get_conf("GPG_ENABLED") else None return config["gpg"]["absent_notice"]["text"] if get_conf("GPG_ENABLED") and "text" in config["gpg"]["absent_notice"] else None
elif param == "GPG_ABSENT_NOTICE_HTML": elif param == "GPG_ABSENT_NOTICE_HTML":
return config["gpg"]["absent_notice"]["html"] if get_conf("GPG_ENABLED") else None return config["gpg"]["absent_notice"]["html"] if get_conf("GPG_ENABLED") and "html" in config["gpg"]["absent_notice"] else None
elif param == "ID_DOMAIN": elif param == "ID_DOMAIN":
return config["id_domain"] return config["id_domain"]
elif param == "KEYSERVER_URL": elif param == "KEYSERVER_URL":
@ -561,25 +561,22 @@ class EmailProxy:
if msg.is_multipart(): if msg.is_multipart():
for part in msg.walk(): for part in msg.walk():
# Check if the part is plain text # Check if the part is plain text
if part.get_content_type() == "text/plain": if part.get_content_type() == "text/plain" and get_conf("GPG_ABSENT_NOTICE_TEXT") is not None:
part.set_payload(part.get_payload() + get_conf("GPG_ABSENT_NOTICE_TEXT")) part.set_payload(part.get_payload() + get_conf("GPG_ABSENT_NOTICE_TEXT"))
# Check if the part is HTML text # Check if the part is HTML text
elif part.get_content_type() == "text/html": elif part.get_content_type() == "text/html" and get_conf("GPG_ABSENT_NOTICE_HTML") is not None:
html_warning = ( part.set_payload(part.get_payload() + get_conf("GPG_ABSENT_NOTICE_HTML"))
f"<p><strong>⚠️ This email was sent without end-to-end encryption.</strong><br>" try:
f"This mail server supports automatic PGP encryption.<br>" part.replace_header(
f"Consider setting up a PGP key and publishing it to a keyserver " "Content-Transfer-Encoding", "quoted-printable"
f"(e.g., keys.openpgp.org).</p>" ) # Ensure HTML part is encoded correctly
) except KeyError:
part.set_payload(part.get_payload() + html_warning) part["Content-Transfer-Encoding"] = "quoted-printable"
part.replace_header(
"Content-Transfer-Encoding", "quoted-printable"
) # Ensure HTML part is encoded correctly
else: else:
# If it's a non-multipart message (either plain-text or HTML only) # If it's a non-multipart message (either plain-text or HTML only)
if msg.get_content_type() == "text/plain": if msg.get_content_type() == "text/plain" and get_conf("GPG_ABSENT_NOTICE_TEXT") is not None:
msg.set_payload(msg.get_payload() + get_conf("GPG_ABSENT_NOTICE_TEXT")) msg.set_payload(msg.get_payload() + get_conf("GPG_ABSENT_NOTICE_TEXT"))
elif msg.get_content_type() == "text/html": elif msg.get_content_type() == "text/html" and get_conf("GPG_ABSENT_NOTICE_HTML") is not None:
msg.set_payload(msg.get_payload() + get_conf("GPG_ABSENT_NOTICE_HTML")) msg.set_payload(msg.get_payload() + get_conf("GPG_ABSENT_NOTICE_HTML"))
msg.replace_header("Content-Transfer-Encoding", "quoted-printable") msg.replace_header("Content-Transfer-Encoding", "quoted-printable")

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@ -13,6 +13,7 @@ Environment=PATH=/path/to/smtpproxy/venv/bin:/usr/bin:/bin
Environment=VIRTUAL_ENV=/path/to/smtpproxy/venv Environment=VIRTUAL_ENV=/path/to/smtpproxy/venv
StandardOutput=journal StandardOutput=journal
StandardError=journal StandardError=journal
SyslogIdentifier=smtpproxy
[Install] [Install]
WantedBy=multi-user.target WantedBy=multi-user.target