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Email rejected due to Sender verify failed
When I check
sudo tail -200 /var/log/mail.log
The email is rejected by the receiver with the following message. I have tried almos everything.
Jan 27 06:02:39 myrhythmhouse postfix/smtp: D426BFCF4A: email@example.com, relay=cipher-tech.com[188.8.131.52]:25, delay=42, delays=0.01/0.03/22/20, dsn=5.0.0, status=bounced (host cipher-tech.com[184.108.40.206] said: 550-Verification failed for firstname.lastname@example.org 550-No Such User Here 550 Sender verify failed (in reply to RCPT TO command))
Please let me know the solution to the problem.
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