![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
![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/4415781987730/mceclip2.png)
Unable Send Email due to errors 'Cannot connect to SMTP server' or '4.4.1 Cannot Connect to Host' – KerioConnect Support
![Getting this error message: The message could not be sent because the connection to Outgoing server (SMTP) smtp.gmail.com was lost in the middle of | Thunderbird Support Forum | Mozilla Support Getting this error message: The message could not be sent because the connection to Outgoing server (SMTP) smtp.gmail.com was lost in the middle of | Thunderbird Support Forum | Mozilla Support](https://assets-prod.sumo.prod.webservices.mozgcp.net/media/uploads/images/2020-03-02-03-19-49-338f62.png)
Getting this error message: The message could not be sent because the connection to Outgoing server (SMTP) smtp.gmail.com was lost in the middle of | Thunderbird Support Forum | Mozilla Support
![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/4415776411538/mceclip1.png)