104 lines
2.9 KiB
Python
104 lines
2.9 KiB
Python
import arrow
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from app.alias_utils import try_auto_create
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from app.config import (
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MIN_TIME_BETWEEN_ACTIVITY_PER_ALIAS,
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MIN_TIME_BETWEEN_ACTIVITY_PER_MAILBOX,
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)
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from app.extensions import db
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from app.log import LOG
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from app.models import Alias, EmailLog, Contact
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def greylisting_needed_for_alias(alias: Alias) -> bool:
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# get the latest email activity on this alias
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r = (
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db.session.query(EmailLog, Contact)
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.filter(EmailLog.contact_id == Contact.id, Contact.alias_id == alias.id)
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.order_by(EmailLog.id.desc())
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.first()
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)
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if r:
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email_log, _ = r
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now = arrow.now()
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if (now - email_log.created_at).seconds < MIN_TIME_BETWEEN_ACTIVITY_PER_ALIAS:
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LOG.d(
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"Too much forward on alias %s. Latest email log %s", alias, email_log,
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)
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return True
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return False
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def greylisting_needed_for_mailbox(alias: Alias) -> bool:
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# get the latest email activity on this mailbox
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r = (
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db.session.query(EmailLog, Contact, Alias)
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.filter(
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EmailLog.contact_id == Contact.id,
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Contact.alias_id == Alias.id,
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Alias.mailbox_id == alias.mailbox_id,
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)
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.order_by(EmailLog.id.desc())
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.first()
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)
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if r:
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email_log, _, _ = r
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now = arrow.now()
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if (now - email_log.created_at).seconds < MIN_TIME_BETWEEN_ACTIVITY_PER_MAILBOX:
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LOG.d(
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"Too much forward on mailbox %s. Latest email log %s. Alias %s",
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alias.mailbox,
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email_log,
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alias,
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)
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return True
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return False
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def greylisting_needed_forward_phase(alias_address: str) -> bool:
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alias = Alias.get_by(email=alias_address)
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if alias:
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return greylisting_needed_for_alias(alias) or greylisting_needed_for_mailbox(
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alias
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)
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else:
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LOG.d(
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"alias %s not exist. Try to see if it can be created on the fly",
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alias_address,
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)
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alias = try_auto_create(alias_address)
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if alias:
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return greylisting_needed_for_mailbox(alias)
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return False
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def greylisting_needed_reply_phase(reply_email: str) -> bool:
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contact = Contact.get_by(reply_email=reply_email)
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if not contact:
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return False
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alias = contact.alias
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return greylisting_needed_for_alias(alias) or greylisting_needed_for_mailbox(alias)
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def greylisting_needed(mail_from: str, rcpt_tos: [str]) -> bool:
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for rcpt_to in rcpt_tos:
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if rcpt_to.startswith("reply+") or rcpt_to.startswith("ra+"):
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reply_email = rcpt_to.lower()
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if greylisting_needed_reply_phase(reply_email):
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return True
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else:
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# Forward phase
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address = rcpt_to.lower() # alias@SL
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if greylisting_needed_forward_phase(address):
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return True
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return False
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