SBS 2011 Exchange certificates issue - SMTP does not accept mails


I'm having an issue with a SBS I installed 2 years ago.

The self-signed certifcates have been expired, and Outlook gave an error on every connection.

I have searched a solution an found one that rebuilt the certificates using these commands:

certreq -new request.inf certnew.req
certreq -submit certnew.req certnew.cer
certreq -accept certnew.cer

and then import this certificate.
After this, and a reboot, the SMTP doesn't accepted any mail.

I have tried several things, but nothing. SMTP refuses to accept mails.

What can I do?

Thank you very much!

Wolfgang RiedmannAsked:
Who is Participating?
Shreedhar EtteConnect With a Mentor Commented:
Please refer article

Follow section "Assign the New Certificate to Exchange Server 2010" to conifgure certificate for SMTP.

After that check the mail flow,
Wolfgang RiedmannAuthor Commented:

a correction: the issue is half solved: the SBS wizard had removed the IP range of the local network from the connectors configuration.

The server now accepts the mail, but I would like to fix also the certificates.

Thank you very much for any help!

Wolfgang RiedmannAuthor Commented:

thank you very much for your answer!

Should I remove old certificates first or let them alone on the server?

Shreedhar EtteCommented:
No need to remove old certiifcated.
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