Check MX record of email domain to see if it is disposed

This commit is contained in:
Son NK 2020-04-27 18:17:50 +02:00
parent ed16e9b478
commit acacab887e

View file

@ -25,6 +25,7 @@ from app.config import (
MAX_NB_EMAIL_FREE_PLAN,
DISPOSABLE_EMAIL_DOMAINS,
)
from app.dns_utils import get_mx_domains
from app.log import LOG
from app.models import Mailbox, User
@ -321,16 +322,40 @@ def can_be_used_as_personal_email(email: str) -> bool:
if CustomDomain.get_by(domain=domain, verified=True):
return False
for d in DISPOSABLE_EMAIL_DOMAINS:
if domain == d:
return False
# subdomain
if domain.endswith("." + d):
if is_disposable_domain(domain):
LOG.d("Domain %s is disposable", domain)
return False
# check if email MX domain is disposable
mx_domains = get_mx_domain_list(domain)
for mx_domain in mx_domains:
if is_disposable_domain(mx_domain):
LOG.d("MX Domain %s %s is disposable", mx_domain, domain)
return False
return True
def is_disposable_domain(domain):
for d in DISPOSABLE_EMAIL_DOMAINS:
if domain == d:
return True
# subdomain
if domain.endswith("." + d):
return True
return False
def get_mx_domain_list(domain) -> [str]:
"""return list of MX domains for a given email.
domain name ends *without* a dot (".") at the end.
"""
priority_domains = get_mx_domains(domain)
return [d[:-1] for _, d in priority_domains]
def email_already_used(email: str) -> bool:
"""test if an email can be used when:
- user signs up