用gmail出现TLS连接无法信任的问题.用下面的命令查看:
openssl s_client -connect smtp.gmail.com:465
CONNECTED(00000003)
depth=1 /C=US/O=Google Inc/CN=Google Internet Authority
verify error:num=20:unable to get local issuer certificate
verify return:0
---
Certificate chain
0 s:/C=US/ST=California/L=Mountain View/O=Google Inc/CN=smtp.gmail.com
i:/C=US/O=Google Inc/CN=Google Internet Authority
1 s:/C=US/O=Google Inc/CN=Google Internet Authority
i:/C=US/O=Equifax/OU=Equifax Secure Certificate Authority
---
Server certificate
-----BEGIN CERTIFICATE-----
MIIDWzCCAsSgAwIBAgIKFMs0nQADAAASjjANBgkqhkiG9w0BAQUFADBGMQswCQYD
VQQGEwJVUzETMBEGA1UEChMKR29vZ2xlIEluYzEiMCAGA1UEAxMZR29vZ2xlIElu
dGVybmV0IEF1dGhvcml0eTAeFw0xMDA0MjIyMDAyNDVaFw0xMTA0MjIyMDEyNDVa
MGgxCzAJBgNVBAYTAlVTMRMwEQYDVQQIEwpDYWxpZm9ybmlhMRYwFAYDVQQHEw1N
b3VudGFpbiBWaWV3MRMwEQYDVQQKEwpHb29nbGUgSW5jMRcwFQYDVQQDEw5zbXRw
.............
.............
发现 i:/C=US/O=Equifax/OU=Equifax Secure Certificate Authority
原来gmail从Thawte的CA改为Equifax.
把postfix的CA改过来就可以relay了.
cd /etc/ssl/certs
cat Equi* > ~/CA.pem
然后根据postfix的设置把CA.pem设置好.
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