![Bizagi Studio > Process wizard > Business Rules > Defining notifications > Email server configuration > Using an SMTP server > Using hMailServer as an SMTP server > Using hMailServer as a relay Bizagi Studio > Process wizard > Business Rules > Defining notifications > Email server configuration > Using an SMTP server > Using hMailServer as an SMTP server > Using hMailServer as a relay](https://help.bizagi.com/bpm-suite/en/smtp_24.png)
Bizagi Studio > Process wizard > Business Rules > Defining notifications > Email server configuration > Using an SMTP server > Using hMailServer as an SMTP server > Using hMailServer as a relay
![Unable Send Email due to errors 'Cannot connect to SMTP server' or '4.4.1 Cannot Connect to Host' – KerioConnect Support Unable Send Email due to errors 'Cannot connect to SMTP server' or '4.4.1 Cannot Connect to Host' – KerioConnect Support](https://support.kerioconnect.gfi.com/hc/article_attachments/360014250239/smtp_debug.png)
Unable Send Email due to errors 'Cannot connect to SMTP server' or '4.4.1 Cannot Connect to Host' – KerioConnect Support
![Enable to send email, server reported error" or "Email server reported an error ... Could not connect to SMTP host" error when trying to send email inside 'Command Center' Enable to send email, server reported error" or "Email server reported an error ... Could not connect to SMTP host" error when trying to send email inside 'Command Center'](https://www.ibm.com/support/pages/system/files/inline-images/image_2445.png)
Enable to send email, server reported error" or "Email server reported an error ... Could not connect to SMTP host" error when trying to send email inside 'Command Center'
![Automation Server > Automation Server configuration and administration guide > Initial project configuration > Best practices in the production environment > Configuring the SMTP service through IIS Automation Server > Automation Server configuration and administration guide > Initial project configuration > Best practices in the production environment > Configuring the SMTP service through IIS](https://help.bizagi.com/bpm-suite/en/smtp_iis.png)