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108 lines
2.9 KiB
Python
108 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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MAX_ACTIVITY_DURING_MINUTE_PER_ALIAS,
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MAX_ACTIVITY_DURING_MINUTE_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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min_time = arrow.now().shift(minutes=-1)
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# get the nb of activity on this alias
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nb_activity = (
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db.session.query(EmailLog)
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.join(Contact, EmailLog.contact_id == Contact.id)
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.filter(
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Contact.alias_id == alias.id,
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EmailLog.created_at > min_time,
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)
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.group_by(EmailLog.id)
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.count()
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)
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if nb_activity > MAX_ACTIVITY_DURING_MINUTE_PER_ALIAS:
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LOG.d(
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"Too much forward on alias %s. Nb Activity %s",
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alias,
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nb_activity,
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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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min_time = arrow.now().shift(minutes=-1)
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# get nb of activity on this mailbox
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nb_activity = (
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db.session.query(EmailLog)
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.join(Contact, EmailLog.contact_id == Contact.id)
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.join(Alias, Contact.alias_id == Alias.id)
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.filter(
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Alias.mailbox_id == alias.mailbox_id,
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EmailLog.created_at > min_time,
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)
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.group_by(EmailLog.id)
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.count()
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)
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if nb_activity > MAX_ACTIVITY_DURING_MINUTE_PER_MAILBOX:
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LOG.d(
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"Too much forward on mailbox %s, alias %s. Nb Activity %s",
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alias.mailbox,
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alias,
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nb_activity,
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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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