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Feature/catchall #43

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Feature/catchall #43

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86fb589
Added detection for _catchall_ addresses
Aug 17, 2015
d5f3dea
Better deact default debug :)
Aug 17, 2015
bf826bc
Now with catch all support :)
Aug 18, 2015
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27 changes: 25 additions & 2 deletions validate_email.py
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Original file line number Diff line number Diff line change
Expand Up @@ -51,6 +51,10 @@ class ServerError(Exception):
# even when it's not strictly necessary. This way we don't forget
# when it is necessary.)
#
# Add-on:
# catchall option added to check if this mailhost is
# serving catch-all addresses. NOT FOUL PROOF
#
WSP = r'[\s]' # see 2.2.2. Structured Header Field Bodies
CRLF = r'(?:\r\n)' # see 2.2.3. Long Header Fields
NO_WS_CTL = r'\x01-\x08\x0b\x0c\x0f-\x1f\x7f' # see 3.2.1. Primitive Tokens
Expand Down Expand Up @@ -109,7 +113,7 @@ def get_mx_ip(hostname):
return MX_DNS_CACHE[hostname]


def validate_email(email, check_mx=False, verify=False, debug=False, smtp_timeout=10):
def validate_email(email, check_mx=False, verify=False, catchall=False, debug=False, smtp_timeout=10):
"""Indicate whether the given string is a valid email address
according to the 'addr-spec' portion of RFC 2822 (see section
3.4.1). Parts of the spec that are marked obsolete are *not*
Expand Down Expand Up @@ -155,6 +159,19 @@ def validate_email(email, check_mx=False, verify=False, debug=False, smtp_timeou
continue
smtp.mail('')
status, _ = smtp.rcpt(email)
if catchall:
import random, string
smtp.quit()
smtp.connect(mx[1])
smtp.helo()
smtp.mail('')
status, _ = smtp.rcpt(''.join(random.choice(string.lowercase) for i in range(25)) + '@' + email.split('@')[1])
if status == 250:
smtp.quit()
return False
if status == 550:
smtp.quit()
return True
if status == 250:
smtp.quit()
return True
Expand Down Expand Up @@ -193,9 +210,15 @@ def validate_email(email, check_mx=False, verify=False, debug=False, smtp_timeou
else:
validate = False

noca = raw_input('Accept catch-all? [yN] ')
if noca.strip().lower() == 'y':
noca = False
else:
noca = True

logging.basicConfig()

result = validate_email(email, mx, validate, debug=True, smtp_timeout=1)
result = validate_email(email, mx, validate, noca, debug=False, smtp_timeout=1)
if result:
print("Valid!")
elif result is None:
Expand Down