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With Telnet you can check whether you can reach our email server from your PC.
On Windows operating systems, the Telnet client has been deactivated by default since Windows Vista. You must therefore activate it first:
Please enter the command telnet, the server name and the server port in the command prompt or in the terminal.
Here are examples of what a successful Telnet connection on our IMAP, Pop3 and SMTP servers under Windows looks like.
telnet imap.ionos.com 143 * OK IMAP server ready H mimapX XXXXX
telnet pop.ionos.com 110 +OK POP server ready H mibapX
telnet smtp.ionos.com 587 220 smtp.ionos.com (mreuX) Welcome to Nemesis ESMTP server