November 30th, 2009
A customer had recently restored their own backup through cPanel, and since doing so they were receiving the following error when trying to send e-mail from cPanel’s webmail (Horde):
553 Incorrect authentication data
They could log in to webmail and receive e-mails fine.
The problem was caused by incorrect mail box permissions. To fix this, simply log in to WHM and go to Email > Repair Mailbox Permissions. If you are an end user and don’t know what WHM is, simply contact your host about the problem and include a link to this post.
November 25th, 2009
One of my customers was receiving a “504 Gateway Timeout Error” when viewing their “Who’s Online” in their Zen Cart administration panel.
After lots of investigating, I eventually found the cause – the customer has a dedicated IP address that their website was running on, and the subnet mask and broadcast address for the IP address were set incorrectly – I must have set them incorrectly when assigning the IP address to the NIC.
Anyway, re-adding the IP address with the correct subnet mask and broadcast address fixed it and it works fine.
November 13th, 2009
One of my customers was getting this error message when trying to send e-mail:
The connection to the server has failed. Subject ‘New email address’, Account: ‘mail.example.com’, Server: ‘mail.example.com’, Protocol: SMTP, Port: 25, Secure(SSL): No, Socket Error: 10013, Error Number: 0x800CCC0E
The problem – some ISP’s block port 25 for all but their own SMTP server. I’m not quite sure why they do this, but it’s annoying! Anyway, to fix the problem, the user needs to either use their ISP’s SMTP server to send e-mails, or they need to change their outgoing SMTP port from port 25 (default) to port 26. You will need to ensure that your mail server is set up to listen on port 26 first though – it is quite common these days, but not all do. If you run a cPanel/WHM server, you can enable port 26 in Exim by logging in to WHM and going to “Service Manager” in the menu. From here, you can set Exim to run on port 26 as well as port 25. Don’t forget to unblock port 26 in your servers firewall!
