If the status is found improper, we restart it using the command: Our Support Engineers first check the Mail server status.įor instance, for the Postfix mail server, we use the command: In some cases, if the mail server do not work properly, then the same error shows up. So, we check the certificate of the mail server. Most often, this situation indicates that the SSL/TLS certificate expired. ![]() Here the first login to the Mail client shows the error message.Īnd when the user tries to send an email, they get the SMTP error -1. Some customers approach us with the SMTP error -1 when they try to send mails using mail clients. Let’s see how our Support Engineers fix these causes. Usually, there are several reasons that lead to the SMTP error. The error message clearly indicated that the Mail client could not connect with the server. But, while trying to send a mail via Roundcube, he got the error: One of our customers had a LAMP server, with Postfix and Roundcube for mail services. Since mail services are critically important, errors in this can be totally frustrating. The mail server connects with each other using this protocol. ![]() Today, let’s have a look into the error and see how our Support Engineers fix it.īasically, SMTP is the Simple Mail Transfer Protocol. Usually, this error occurs due to firewall restrictions, mail server malfunctioning, and so on.Īt Bobcares, we often get requests to fix SMTP errors, as a part of our Server Management Services. That was an error message our customer recently got while trying to send mails via Roundcube. SMTP Error (-1): Connection to server failed.
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