![How to fix SMTP Error (-1): Connection to server failed in RoundCube? - Knowledgebase - AccuWebHosting How to fix SMTP Error (-1): Connection to server failed in RoundCube? - Knowledgebase - AccuWebHosting](https://manage.accuwebhosting.com/kb-images/SMTP/SMTP-1.png)
How to fix SMTP Error (-1): Connection to server failed in RoundCube? - Knowledgebase - AccuWebHosting
![How to fix SMTP Error (-1): Connection to server failed in RoundCube? - Knowledgebase - AccuWebHosting How to fix SMTP Error (-1): Connection to server failed in RoundCube? - Knowledgebase - AccuWebHosting](https://manage.accuwebhosting.com/kb-images/SMTP/SMTP-4.png)
How to fix SMTP Error (-1): Connection to server failed in RoundCube? - Knowledgebase - AccuWebHosting
![How to Fix SMTP ERROR: Failed to connect to server: Connection refused (111) error on WordPress - Interserver Tips How to Fix SMTP ERROR: Failed to connect to server: Connection refused (111) error on WordPress - Interserver Tips](https://www.interserver.net/tips/wp-content/uploads/2018/09/Fix-SMTP-Error1.png)
How to Fix SMTP ERROR: Failed to connect to server: Connection refused (111) error on WordPress - Interserver Tips
![How to fix SMTP Error (-1): Connection to server failed in RoundCube? - Knowledgebase - AccuWebHosting How to fix SMTP Error (-1): Connection to server failed in RoundCube? - Knowledgebase - AccuWebHosting](https://manage.accuwebhosting.com/kb-images/SMTP/SMTP-3.png)
How to fix SMTP Error (-1): Connection to server failed in RoundCube? - Knowledgebase - AccuWebHosting
![How to Fix SMTP ERROR: Failed to connect to server: Connection refused (111) error on WordPress - Interserver Tips How to Fix SMTP ERROR: Failed to connect to server: Connection refused (111) error on WordPress - Interserver Tips](https://www.interserver.net/tips/wp-content/uploads/2018/09/Fix-SMTP-Error4.png)
How to Fix SMTP ERROR: Failed to connect to server: Connection refused (111) error on WordPress - Interserver Tips
![e-Padi Corporation on Twitter: "Webmail roundcube mail client SMTP Error (-1): Connection to server failed https://t.co/wXN0RAK9wV https://t.co/K4dJEpRDEt" / Twitter e-Padi Corporation on Twitter: "Webmail roundcube mail client SMTP Error (-1): Connection to server failed https://t.co/wXN0RAK9wV https://t.co/K4dJEpRDEt" / Twitter](https://pbs.twimg.com/media/DPNQzy_VQAABXZu.jpg)
e-Padi Corporation on Twitter: "Webmail roundcube mail client SMTP Error (-1): Connection to server failed https://t.co/wXN0RAK9wV https://t.co/K4dJEpRDEt" / Twitter
SMTP Error (-1): Connection to server failed. · Issue #13275 · YetiForceCompany/YetiForceCRM · GitHub
![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
![How to Fix SMTP ERROR: Failed to connect to server: Connection refused (111) error on WordPress - Interserver Tips How to Fix SMTP ERROR: Failed to connect to server: Connection refused (111) error on WordPress - Interserver Tips](https://www.interserver.net/tips/wp-content/uploads/2018/09/Fix-SMTP-Error3.png)
How to Fix SMTP ERROR: Failed to connect to server: Connection refused (111) error on WordPress - Interserver Tips
![SQL SERVER - Database Mail Error: The SMTP Server Requires a Secure Connection or the Client was not Authenticated. The Server Response Was: 5.5.1 - SQL Authority with Pinal Dave SQL SERVER - Database Mail Error: The SMTP Server Requires a Secure Connection or the Client was not Authenticated. The Server Response Was: 5.5.1 - SQL Authority with Pinal Dave](https://blog.sqlauthority.com/wp-content/uploads/2018/06/dbmail-ssl-01-800x359.jpg)
SQL SERVER - Database Mail Error: The SMTP Server Requires a Secure Connection or the Client was not Authenticated. The Server Response Was: 5.5.1 - SQL Authority with Pinal Dave
![SMTP connect() failed. https://github.com/PHPMailer/PHPMailer/wiki/Troubleshooting - Software Support - PKP Community Forum SMTP connect() failed. https://github.com/PHPMailer/PHPMailer/wiki/Troubleshooting - Software Support - PKP Community Forum](https://forum.pkp.sfu.ca/uploads/default/original/3X/4/e/4ed7bdd8c1f818c65de48fe82a3260cfcb47a6b7.jpeg)