Hey Bi Trần, to resolve the "AlgorithmMismatch" issue between your Exchange 2013 server and the sender's server at VE1PR06MB7007.eurprd06.prod.outlook.com you need to check this steps:
- Update Exchange 2013 to the latest service packs and cumulative updates.
- Ensure TLS settings are compatible; check and update SSL/TLS certificate configuration.
- Verify firewall and network settings, and check for any antivirus/antispam interference.
- Contact the sender's email provider (Outlook.com) for assistance.
- Enable detailed SMTP logging on your Exchange server for further diagnostics.
- Consider implementing email encryption for secure communication.
If none of this working, please come back for further details.
Cecoi Pavel !