Articles on: Email

How to configure K-9 Mail for Android using IMAP

This guide walks you through setting up email on your Android Device using the k-9 Mail App.

This article assumes that you have already configured a mailbox within a Krystal cPanel account. To carry out the instructions in this article you will need the Manual Settings for your mailbox.

There are now two options for setting up your email client. Option 1 is preferred, but does have some prerequisites.Option 1 - Use mail.yourdomain for inbound and outbound mail server (IMAP Hostname and SMTP Hostname) e.g. if your domain is example.co.uk you would use mail.example.co.ukPrerequisitesYour domain’s A record must be pointing to your Krystal hosting server. If your domain is registered with Krystal and you host your website here then this is likely the case.You must have SSL enabled for the domain. Once your domain is correctly pointing to Krystal a free Let's Encrypt™ certificate will be issued automatically.If you meet these requirements then you can use the format mail.yourdomain for the inbound (IMAP Hostname) and outbound (SMTP Hostname) mail servers in the instructions below e.g. if your domain is example.co.uk then you would use mail.example.co.uk as the inbound and outbound mail server names.This option has the benefit of meaning that should you change hosting servers at any point you won’t need to re-configure any email clients. Once the DNS has updated for your new server A record the clients will continue to be able to send and receive email.Option 2 - use the server hostname for inbound and outbound mail serverThis option has no prerequisites. However, you should be aware that if you use this method, and at a later date change hosting servers you will need to re-configure any email clients.If you are a reseller this would also impact all your client accounts.

Open the K-9 Mail application.

Enter the email address you wish to use and its associated password.

Once done tap Next.
Tap IMAP.
Enter the required information for the Incoming Server settings:

IMAP Server: This should be set to either mail.yourdomain or your Home Server name - edit it to whichever you are using.
Security: SSL/TLS
Port: 993
Username: The email address you are trying to connect to.
Authentication: Normal Password.
Password: The password of the email address.
Auto-detect IMAP namespace: Checked.
Tap Next.
Enter the required information for the outgoing server settings:

SMTP Server: This should be set to either mail.yourdomain your Home Server name - usually the same as the Incoming server setting
Security: SSL/TLS
Port: 465
Require Sign-in: Checked
Username: The email address you are trying to connect to.
Authentication: Normal Password.
Password: The password of the email address.
Tap Next.
The majority of this screen can be left as is. You can adjust how often the app will check for new email in the poll frequency drop-down.
Enter the required information:

Give this account a name: Enter how you wish the K-9 app to refer to this email address.
Type your name: This will be shown to recipients of your emails.
Tap Done.
Your email account has been added. Clicking on the name we gave the account in step 7 will take you through to your inbox.
If you wish to view other folders, such as Outbox, Sent, Spam, etc you can do this by clicking on the K-9 icon in the top left.

Updated on: 24/01/2024

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