adding proper TLS configuration for Postfix (in and out)
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@ -55,3 +55,19 @@ message_size_limit = 100000000
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virtual_mailbox_limit = 0
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mailbox_size_limit = 0
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enable_original_recipient = no
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smtp_tls_dcert_file = $smtpd_tls_dcert_file
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smtp_tls_dkey_file = $smtpd_tls_dcert_file
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smtp_tls_CAfile = $smtpd_tls_CAfile
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smtp_tls_key_file = $smtpd_tls_dcert_file
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smtp_tls_cert_file = $smtpd_tls_dcert_file
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smtp_use_tls = yes
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smtp_tls_session_cache_database = btree:${data_directory}/smtp_scache
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smtpd_tls_protocols = TLSv1, TLSv1.1, TLSv1.2
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smtp_tls_protocols = TLSv1, TLSv1.1, TLSv1.2
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smtpd_tls_exclude_ciphers = aNULL, DES, 3DES, MD5, DES+MD5, RC4
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smtp_tls_exclude_ciphers = aNULL, DES, 3DES, MD5, DES+MD5, RC4
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tls_preempt_cipherlist = yes
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smtpd_tls_mandatory_ciphers = high
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smtp_tls_mandatory_ciphers = high
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smtpd_tls_ciphers = high
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smtp_tls_ciphers = high
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