Error: posftix: warning: SASL authentication failure: No worthy mechs found

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After configuring postfix relay server I found their was some issue with gmail server authentication, it will bounce the emails

Error : 
 postfix/smtp[25857]: 59BF721177: SASL authentication failed; cannot authenticate to server smtp.gmail.com[74.125.25.108]: no mechanism available
 postfix/smtp[25861]: warning: SASL authentication failure: No worthy mechs found

Their must be two solid reasons behind this
1, SASL package is missing for plain module

yum install cyrus-sasl{,-plain}

2, Allow plaintext (which is fine when using STARTTLS): make the connection enrypted

smtp_sasl_security_options = noanonymous

Make Sure you enabled all the below options :

smtp_sasl_auth_enable = yes
smtp_use_tls = yes
smtp_tls_loglevel = 1
smtp_tls_security_level = encrypt
smtp_sasl_mechanism_filter = login

 

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