Is that possible to get a response from following method. Either any way to see to_email is a valid one
smtpObj.sendmail(sender, receivers, message)
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I didn't test it but how about `response = smtpObj.sendmail(sender, receivers, message)` ? But I'm not sure if it doesn't raise error when `to_email` is wrong. – furas Jul 22 '22 at 19:27
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I'm not sure if SMTP sends response directly - it may try to send this mail few times with some delays (somethimes few hours) and when it will not work then it may send back mail to `from_addr` – furas Jul 22 '22 at 19:33
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[How to check if an email address exists without sending an email? - Stack Overflow](https://stackoverflow.com/questions/565504/how-to-check-if-an-email-address-exists-without-sending-an-email) – furas Jul 22 '22 at 19:35