I have to send an email via port 587. Do I have to use a TLS connection if I use submission port?

Yes, you would need to use a TLS connection to use a submission port in order for you to send an email

In Plesk10, to enhance the security, the transmission was used (port 587) submission port, To enable the settings for communication using TLS (STARTTLS) is required, use the STARTTLS on the e-mail software There is a need. If you want to change this specification, in file "master.cf" Configuring postfix, There is a need to change some settings for the description of the line "submission" service, lowering the security level.

File :/ etc / postfix / master.cf configuration , "Smtpd_tls_security_level" has been described in the setting for "submission" service Changes: Changed to "may" from "encrypt" the value of the parameter Modification: -------------------------------------------------- ------------ submission inet n - n - smtpd-o smtpd_enforce_tls = yes-o smtpd_tls_security_level = may-o smtpd_sasl_auth_enable = yes-o smtpd_client_restrictions = permit_sasl_authenticated, reject-o smtpd_sender_restrictions =-o smtpd_proxy_filter = -------------------------------------------------- ------------

After changing the settings, the postfix reload to reload the configuration There is a need to perform.

■ Example of command execution ------------------- # Postfix reload ------------------- , "#" Is the shell prompt. There is no need to type in practice. Operation command to change the configuration file so not supported.

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