![\"\"](\"https:\/\/easy-admin.ca\/wp-content\/uploads\/2017\/02\/POSTFIX-SASL_8a92e523db593d739cc2e902474468b8.png\")
<\/p>\n<\/p>\n
I have been setting up a new mail server recently with Postfix and SMTP Auth, and got the error message “no SASL authentication mechanisms”.<\/p>\n
If you have enabled SMTP Auth with Postfix like this:<\/p>\n
smtpd_sasl_auth_enable = yes\r\nsmtpd_sasl_security_options = noanonymous\r\nsmtpd_sasl_local_domain = $myhostname\r\nbroken_sasl_auth_clients = yes\r\nsmtpd_recipient_restrictions =\r\n permit_sasl_authenticated,\r\n permit_mynetworks,\r\n reject_unauth_destination<\/pre>\nand are getting messages like this (the extract below is from the mail log file):<\/p>\n
Nov 2 15:31:09 vps131 postfix\/smtpd[14007]: warning: dict_nis_init: NIS domain name not set - NIS lookups disabled\r\nNov 2 15:31:09 vps131 postfix\/smtpd[14007]: warning: xsasl_cyrus_server_get_mechanism_list: no applicable SASL mechanisms\r\nNov 2 15:31:09 vps131 postfix\/smtpd[14007]: fatal: no SASL authentication mechanisms\r\nNov 2 15:31:10 vps131 postfix\/master[12004]: warning: process \/usr\/libexec\/postfix\/smtpd pid 14007 exit status 1\r\nNov 2 15:31:10 vps131 postfix\/master[12004]: warning: \/usr\/libexec\/postfix\/smtpd: bad command startup -- throttling<\/pre>\nthen you need to install the cyrus-sasl-plain package like so:<\/p>\n
yum install cyrus-sasl-plain<\/pre>\nThe above method will install the cyrus-sasl-plain packages on CentOS and other RPM\/Yum based Linux distributions, so you would need to use the appropriate package manager (and software package) for other Linux distros.<\/p>\n
# systemctl status saslauthd<\/p>\n
# systemctl start saslauthd<\/p>\n
# systemctl enable saslauthd<\/p>\n
NOTES :<\/p>\n
# SASL CONFIGURATION<\/strong> You may verified your email server security score here:<\/strong><\/p>\n http:\/\/www.emailsecuritygrader.com<\/p>\n Here is a part of my \/etc\/postfix\/main.cf<\/strong><\/p>\n # Sender restrictions<\/strong> \ud83d\ude42<\/p>\n","protected":false},"excerpt":{"rendered":" I have been setting up a new mail server recently with Postfix and SMTP Auth, and got the error message “no SASL authentication mechanisms”. If you have enabled SMTP Auth with Postfix like this: smtpd_sasl_auth_enable = yes smtpd_sasl_security_options = noanonymous smtpd_sasl_local_domain = $myhostname broken_sasl_auth_clients = yes smtpd_recipient_restrictions = permit_sasl_authenticated, permit_mynetworks, reject_unauth_destination and are getting messages … Continue reading Postfix SMTP Auth Error “no SASL authentication mechanisms”<\/span><\/a><\/p>\n","protected":false},"author":2,"featured_media":0,"comment_status":"closed","ping_status":"closed","sticky":false,"template":"","format":"standard","meta":{"slim_seo":{"title":"Postfix SMTP Auth Error \"no SASL authentication mechanisms\" - HP Server","description":"I have been setting up a new mail server recently with Postfix and SMTP Auth, and got the error message \"no SASL authentication mechanisms\". If you have enabled"},"footnotes":""},"categories":[1],"tags":[],"class_list":["post-1142","post","type-post","status-publish","format-standard","hentry","category-general"],"_links":{"self":[{"href":"https:\/\/easy-admin.ca\/index.php\/wp-json\/wp\/v2\/posts\/1142","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/easy-admin.ca\/index.php\/wp-json\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/easy-admin.ca\/index.php\/wp-json\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"https:\/\/easy-admin.ca\/index.php\/wp-json\/wp\/v2\/users\/2"}],"replies":[{"embeddable":true,"href":"https:\/\/easy-admin.ca\/index.php\/wp-json\/wp\/v2\/comments?post=1142"}],"version-history":[{"count":0,"href":"https:\/\/easy-admin.ca\/index.php\/wp-json\/wp\/v2\/posts\/1142\/revisions"}],"wp:attachment":[{"href":"https:\/\/easy-admin.ca\/index.php\/wp-json\/wp\/v2\/media?parent=1142"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/easy-admin.ca\/index.php\/wp-json\/wp\/v2\/categories?post=1142"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/easy-admin.ca\/index.php\/wp-json\/wp\/v2\/tags?post=1142"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}
\nsmtpd_sasl_auth_enable = yes
\nsmtpd_sasl_security_options = noanonymous
\nsmtpd_sasl_local_domain = $myhostname
\nbroken_sasl_auth_clients = yes
\nsmtpd_recipient_restrictions = permit_mynetworks permit_inet_interfaces permit_sasl_authenticated
\n#<\/strong><\/p>\n![\"\"](\"https:\/\/easy-admin.ca\/wp-content\/uploads\/2017\/02\/email-security-score_ae3461e528851e6e43238486f18f87a3.png\")
<\/p>\n
\nsmtpd_sender_restrictions =
\npermit_mynetworks,
\nreject_non_fqdn_sender,
\nreject_unknown_sender_domain,
\npermit
\n#<\/strong>
\nreject_rbl_client zen.spamhaus.org,
\nreject_rbl_client bl.spamcop.net,
\ncheck_policy_service unix:postgrey\/socket,
\npermit
\n# Postfix AntiSpam Configuration<\/strong>
\ndisable_vrfy_command = yes
\nsmtpd_helo_required = yes
\nsmtpd_helo_restrictions = permit_mynetworks,
\nreject_non_fqdn_hostname,
\nreject_invalid_hostname,
\npermit
\n#<\/strong>
\nsmtpd_sasl_auth_enable = yes
\nsmtpd_sasl_local_domain = $myhostname
\n#<\/strong>
\nbroken_sasl_auth_clients = yes
\nsmtpd_recipient_restrictions = permit_mynetworks permit_inet_interfaces permit_sasl_authenticated
\n#<\/strong>
\nsmtpd_error_sleep_time = 1s
\nsmtpd_soft_error_limit = 10
\nsmtpd_hard_error_limit = 20
\nsmtpd_client_restrictions = permit_mynetworks permit_inet_interfaces
\n#<\/strong>
\nsmtpd_enforce_tls = yes
\nsmtpd_tls_loglevel = 1
\nsmtpd_use_tls = yes
\nsmtpd_tls_key_file = \/etc\/postfix\/smtpd.key
\nsmtpd_tls_cert_file = \/etc\/postfix\/smtpd.cert
\n# Experimental<\/strong>
\nsmtpd_tls_security_level = may
\nsmtpd_tls_auth_only = yes
\nsmtpd_recipient_restrictions = permit_mynetworks permit_sasl_authenticated reject_unauth_destination
\nsmtpd_sasl_security_options = noanonymous
\nsmtpd_sasl_application_name = smtpd<\/p>\n