def generate_reply_email(contact_email: str, user: User) -> str:
"""
generate a reply_email (aka reverse-alias), make sure it isn't used by any contact
"""
# shorten email to avoid exceeding the 64 characters
# from https://tools.ietf.org/html/rfc5321#section-4.5.3
# "The maximum total length of a user name or other local-part is 64
# octets."
# todo: turns this to False after Dec 20 2020
include_sender_in_reverse_alias = True
# user has chosen an option explicitly
if user.include_sender_in_reverse_alias is not None:
include_sender_in_reverse_alias = user.include_sender_in_reverse_alias
if include_sender_in_reverse_alias and contact_email:
# control char: 4 chars (ra+, +)
# random suffix: max 10 chars
# maximum: 64
# make sure contact_email can be ascii-encoded
contact_email = convert_to_id(contact_email)
contact_email = contact_email.lower().strip().replace(" ", "")
contact_email = contact_email[:45]
contact_email = contact_email.replace("@", ".at.")
contact_email = convert_to_alphanumeric(contact_email)
# not use while to avoid infinite loop
for _ in range(1000):
if include_sender_in_reverse_alias and contact_email:
random_length = random.randint(5, 10)
reply_email = (
f"ra+{contact_email}+{random_string(random_length)}@{EMAIL_DOMAIN}"
)
else:
random_length = random.randint(20, 50)
reply_email = f"ra+{random_string(random_length)}@{EMAIL_DOMAIN}"
if not Contact.get_by(reply_email=reply_email):
return reply_email
raise Exception("Cannot generate reply email")
def generate_reply_email(contact_email: str, user: User) -> str:
"""
generate a reply_email (aka reverse-alias), make sure it isn't used by any contact
"""
# shorten email to avoid exceeding the 64 characters
# from https://tools.ietf.org/html/rfc5321#section-4.5.3
# "The maximum total length of a user name or other local-part is 64
# octets."
include_sender_in_reverse_alias = False
# user has set this option explicitly
if user.include_sender_in_reverse_alias is not None:
include_sender_in_reverse_alias = user.include_sender_in_reverse_alias
if include_sender_in_reverse_alias and contact_email:
# make sure contact_email can be ascii-encoded
contact_email = convert_to_id(contact_email)
contact_email = sanitize_email(contact_email)
contact_email = contact_email[:45]
contact_email = contact_email.replace("@", ".at.")
contact_email = convert_to_alphanumeric(contact_email)
# not use while to avoid infinite loop
for _ in range(1000):
if include_sender_in_reverse_alias and contact_email:
random_length = random.randint(5, 10)
reply_email = (
# do not use the ra+ anymore
# f"ra+{contact_email}+{random_string(random_length)}@{EMAIL_DOMAIN}"
f"{contact_email}_{random_string(random_length)}@{EMAIL_DOMAIN}"
)
else:
random_length = random.randint(20, 50)
# do not use the ra+ anymore
# reply_email = f"ra+{random_string(random_length)}@{EMAIL_DOMAIN}"
reply_email = f"{random_string(random_length)}@{EMAIL_DOMAIN}"
if not Contact.get_by(reply_email=reply_email):
return reply_email
raise Exception("Cannot generate reply email")
