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Category: eMailserver

Red mailboxes against a light-colored exterior wall, with a letter inserted in one of them.
postfix
Postfix 3.10: Updates, TLSRPT, and the Road to 3.11

Postfix 3.10 is still being maintained, but it is a legacy branch. This article explains TLSRPT, secure update procedures, submission privacy, and the decision between continuing to apply patches and upgrading to Postfix 3.11.

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Instructions
SRS with postfix under CentOS

In the last few days united internet has decided to block forwarded emails e.g. to gmx or web.de addresses. For customers of other providers

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postfix: Perfect Forward Secrecy (PFS)

openssl gendh -out /etc/postfix/pfs_512.pem -2 512 openssl gendh -out /etc/postfix/pfs_1024.pem -2 1024 postconf -e "smtpd_tls_dh1024_param_file=/etc/postfix/pfs_1024.pem" postconf -e "smtpd_tls_dh512_param_file=/etc/postfix/pfs_512.pem" postconf -e "smtpd_tls_eecdh_grade=strong" postconf -e "smtp_tls_loglevel=1" postconf

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