Smtp 535.7.8错误：身份验证失败：身份验证失败

在我的邮件服务器上使用postfix设置smtp身份验证时遇到问题。我在sasl_passwd文件中设置了一个测试用户，其信息为test:testpass。运行AUTH LOGIN时也会获得相同的结果

220 rossiscloud.co.uk ESMTP Postfix
ehlo rossiscloud.co.uk
250-rossiscloud.co.uk
250-PIPELINING
250-SIZE 10240000
250-VRFY
250-ETRN
250-STARTTLS
250-AUTH DIGEST-MD5 CRAM-MD5 NTLM PLAIN LOGIN
250-AUTH=DIGEST-MD5 CRAM-MD5 NTLM PLAIN LOGIN
250-ENHANCEDSTATUSCODES
250-8BITMIME
250 DSN
AUTH PLAIN dGVzdAB0ZXN0AHRlc3RwYXNz
535 5.7.8 Error: authentication failed: authentication failure

日志：

main.cf

smtp_sasl_password_maps = hash:/etc/postfix/sasl_passwd
smtpd_sasl_auth_enable = yes
smtpd_tls_cert_file=/etc/letsencrypt/live/rossiscloud.co.uk/cert.pem
smtpd_tls_key_file=/etc/letsencrypt/live/rossiscloud.co.uk/privkey.pem
smtpd_use_tls=yes
smtpd_sasl_security_options = noanonymous
smtpd_tls_session_cache_database = btree:${data_directory}/smtpd_scache
smtp_tls_session_cache_database = btree:${data_directory}/smtp_scache
smtpd_sasl_local_domain = $myhostname
broken_sasl_auth_clients = yes
smtpd_recipient_restrictions =
   permit_sasl_authenticated,
   permit_mynetworks,
   check_relay_domains

smtp_sasl_password_maps = hash:/etc/postfix/sasl_passwd
smtpd_sasl_auth_enable = yes
smtpd_tls_cert_file=/etc/letsencrypt/live/rossiscloud.co.uk/cert.pem
smtpd_tls_key_file=/etc/letsencrypt/live/rossiscloud.co.uk/privkey.pem
smtpd_use_tls=yes
smtpd_sasl_security_options = noanonymous
smtpd_tls_session_cache_database = btree:${data_directory}/smtpd_scache
smtp_tls_session_cache_database = btree:${data_directory}/smtp_scache
smtpd_sasl_local_domain = $myhostname
broken_sasl_auth_clients = yes
smtpd_recipient_restrictions =
   permit_sasl_authenticated,
   permit_mynetworks,
   check_relay_domains