You’re making an HTTP request in Python and suddenly: s s l . S S L C e r t V e r i f i c a t i o n E r r o r : [ S S L : C E R T I F I C A T E _ V E R I F Y _ F A I L E D ] c e r t i f i c a t e v e r i f y f a i l e d : u n a b l e t o g e t l o c a l i s s u e r c e r t i f i c a t e Or with requests: ...
You’re using Python’s imaplib to search emails, but mail.search() keeps returning empty results even though you know matching emails exist. Here’s why it happens and how to fix it. The Problem 1 2 3 4 5 6 7 8 9 import imaplib mail = imaplib.IMAP4_SSL('imap.gmail.com') mail.login('user@gmail.com', 'app-password') mail.select('INBOX') # This returns nothing! status, messages = mail.search(None, 'FROM "john@example.com" SUBJECT "invoice"') print(messages) # [b''] You’ve verified the emails exist. You can see them in Gmail. But search() returns an empty byte string. ...