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Understanding file sizes

Every file on a computer uses a certain amount of resources when sent over the internet or stored.  Keeping mind of your kilobytes (kB) and megabytes (MB) can prevent problems and produce a smoother online experience.  This GreenNet guide is here to help you tell the whales from the minnows.

I am receiving email fine, but I cannot send messages

Sometimes you’ll open your email client and your email will arrive in your inbox, but when it comes to sending a message you get an error message. Here are the few steps to follow for Outlook or Thunderbird to fix this.

Exim and greylisting

Here are some technical remarks about email transport issues

Moving emails from Outlook Express to Mac OS X

There are a number of ways to get your emails over from a PC to a Mac (e.g. doing “The IMAP Shuffle” or using a program like Outlook2Mac), but you can also do it using an open source utility called DbxConv. Here’s how:

How to Enable SMTP Authentication for Mozilla Thunderbird Mail (Mac & Windows)

This document explains how to enable SMTP authentication for the Mozilla Thunderbird Mail client for both Windows and Macintosh computers.


  1. Open Thunderbird Mail. From the Tools menu select Account Settings. The Account Settings box appears.

  2. In the white area on the left, select the entry Outgoing Server (SMTP).

Settings at a glance

Use these settings to configure your dial-up networking, email and FTP software for connecting to GreenNet’s online services.

How to set up your GreenNet email on an Android phone

These instructions are for when you want to check your GreenNet account on an Android-based smartphone or device such as a Samsung* Galaxy, Sony Xperia, HTC One, Fairphone FP1U, Google Nexus, Motorola phone, Asus Eee or LG Pad.  This applies to the standard built-in email client, rather than any additional

Set up GreenNet account in Mac Mail

Setting up your GreenNet email account in Mac Mail is easy if you have the right information. You will need to look through the details we sent you for your username and password, but the rest of the information is provided below. Once you have it, you are ready to set up Mac Mail.

Example of mailbox size alert

We are aware of phishing scam emails which claim to be warning about email accounts reaching their size limit.  Genuine alerts about the size of a GreenNet mailbox do not ask for your login details, and use the following template:

Mail server outage, Sat 8 June 2013

Update, Mon am: Following another, shorter, outage on Sunday at 12 noon affecting GreenNet mail and web servers, we will be undertaking urgent work today to upgrade our network switches.  This may result in some momentary failures to connect between 11am and 1pm.  As always, do not adjust your settings, and no email will be lost, although delays in receiving mail of a few minutes may occur.  Apologies for the inconvenience.

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