def validate_email(email, mode=None):
# Checks that an email address is syntactically valid. Returns True/False.
# Until Postfix supports SMTPUTF8, an email address may contain ASCII
# characters only; IDNs must be IDNA-encoded.
#
# When mode=="user", we're checking that this can be a user account name.
# Dovecot has tighter restrictions - letters, numbers, underscore, and
# dash only!
#
# When mode=="alias", we're allowing anything that can be in a Postfix
# alias table, i.e. omitting the local part ("@domain.tld") is OK.
# Check the syntax of the address.
try:
validate_email_(email,
allow_smtputf8=False,
check_deliverability=False,
allow_empty_local=(mode=="alias")
)
except EmailNotValidError:
return False
if mode == 'user':
# There are a lot of characters permitted in email addresses, but
# Dovecot's sqlite auth driver seems to get confused if there are any
# unusual characters in the address. Bah. Also note that since
# the mailbox path name is based on the email address, the address
# shouldn't be absurdly long and must not have a forward slash.
if len(email) > 255: return False
if re.search(r'[^\@\.a-zA-Z0-9_\-]+', email):
return False
# Everything looks good.
return True
def validate_email(email, mode=None):
# Checks that an email address is syntactically valid. Returns True/False.
# Until Postfix supports SMTPUTF8, an email address may contain ASCII
# characters only; IDNs must be IDNA-encoded.
#
# When mode=="user", we're checking that this can be a user account name.
# Dovecot has tighter restrictions - letters, numbers, underscore, and
# dash only!
#
# When mode=="alias", we're allowing anything that can be in a Postfix
# alias table, i.e. omitting the local part ("@domain.tld") is OK.
# Check the syntax of the address.
try:
validate_email_(email,
allow_smtputf8=False,
check_deliverability=False,
allow_empty_local=(mode=="alias")
)
except EmailNotValidError:
return False
if mode == 'user':
# There are a lot of characters permitted in email addresses, but
# Dovecot's sqlite auth driver seems to get confused if there are any
# unusual characters in the address. Bah. Also note that since
# the mailbox path name is based on the email address, the address
# shouldn't be absurdly long and must not have a forward slash.
if len(email) > 255: return False
if re.search(r'[^\@\.a-zA-Z0-9_\-]+', email):
return False
# Everything looks good.
return True
def validate_email(email, mode=None):
# Checks that an email address is syntactically valid. Returns True/False.
# An email address may contain ASCII characters only because Dovecot's
# authentication mechanism gets confused with other character encodings.
#
# When mode=="user", we're checking that this can be a user account name.
# Dovecot has tighter restrictions - letters, numbers, underscore, and
# dash only!
#
# When mode=="alias", we're allowing anything that can be in a Postfix
# alias table, i.e. omitting the local part ("@domain.tld") is OK.
# Check the syntax of the address.
try:
validate_email_(email,
allow_smtputf8=False,
check_deliverability=False,
allow_empty_local=(mode=="alias")
)
except EmailNotValidError:
return False
if mode == 'user':
# There are a lot of characters permitted in email addresses, but
# Dovecot's sqlite auth driver seems to get confused if there are any
# unusual characters in the address. Bah. Also note that since
# the mailbox path name is based on the email address, the address
# shouldn't be absurdly long and must not have a forward slash.
# Our database is case sensitive (oops), which affects mail delivery
# (Postfix always queries in lowercase?), so also only permit lowercase
# letters.
if len(email) > 255: return False
if re.search(r'[^\@\.a-z0-9_\-]+', email):
return False
# Everything looks good.
return True
