[BlueOnyx:26481] Strange SSL error

[Colin Jack]

Good morning,

We have a strange SSL error with email that has just raised its head. Been fine for years but may have been an update?

We have a 5210R running postfix.

A Vsite on the server has a couple of web aliases (historical combining of servers).

The LE cert has all aliases and if using a web browser to access roundcube then it all works fine. Site is secure.
Many of our customers are still using one of the aliases in their email client server address and have done for years.

This weekend we started getting complaints of SSL errors when using email clients – the email client apparently returning the cert for the host server rather than the vsite when using one of the aliases. Changing to the primary host for the vsite in the email client settings solves the problem but many of our customers are elderly and not comfortable with changing settings.

Does anybody know what has changed and why this is suddenly happening?

Hope I have explained clearly!

Thanks

Colin

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