Yahoo! JAPAN

2018/7/31 -Cause. Server's hostname is not defined, so Fisheye sends the server's IP address instead of the hostname. Resolution. Edit /etc/hosts ...

2016/2/26 -Server's hostname is not defined, so Confluence or JIRA sends the server's IP address instead of the hostname on the HELO SMTP command.

2023/10/9 -In this case, the email server cannot process the SMTP command "HELO hostname", so APM CE (CEM) is unable to send the email. Environment.

I have Postfix configured on the same machine hosting a redmine site. I am now using Postfix and Courier for IMAP/POP/SMTP services, and all is well.

2018/10/11 -For some reason name: 'mydomain.com', is incorrect, and when removing it, I no longer get the error.

2006/12/1 -Hi, I am getting an error message : "MessagingException: 501 Syntax: HELO hostname" when trying to send mail using Java Mail API.

2012/12/21 -I have an issue since upgrading ASSP to the latest version. I have been on the ASSP forum but need some help here.

2008/1/5 -Hi i am currently trying to make a registration system that sends out mails containing username and passwords etc. I have successfully made ...

2020/3/25 -The server domain name in Plesk is the one marked in yellow. The MX address is mail.piekielko.com. How to change the name HELO on mail.piekielko

The helo command according to the RFC specification requires a valid hostname parameter or it gives a "501 Syntax: HELO hostname" error. If the parameter is ...