chào,
thông thường ssl bị hết hạn, do mặc định của zimbra là 1 năm
bạn có thể khởi tạo lại như sau:
1) If the certificates have expired, you can reissue a single-node self-assigned certificate by running the following commands.
/opt/zimbra/bin/zmcertmgr createca -new
2) To generate a certificate signed by the CA that expires in 365 days:
/opt/zimbra/bin/zmcertmgr createcrt -new -days 365
3) To deploy the certificate:
/opt/zimbra/bin/zmcertmgr deploycrt self
4) To deploy the certificate:
/opt/zimbra/bin/zmcertmgr deployca
5) To confirm the certificates have been deployed:
/opt/zimbra/bin/zmcertmgr viewdeployedcrt
Do restart Zimbra service to apply changes.