How to Access Your Webmail in ISPConfig

This guide shows you how to reach your Noiz webmail: the browser-based inbox for a mailbox hosted on your ISPConfig account. Webmail on Noiz hosting is provided by Roundcube, so you may see it called Roundcube, web mail, online email or simply "email in the browser", and they all mean the same thing. Webmail lets you read and send mail from any computer with a web browser, without installing or configuring anything, which makes it the quickest way to check a new mailbox or to get at your mail from a machine that is not your own. This article is for Noiz clients who already have a mailbox and want to sign in to it from a browser.

Last reviewed: 27 July 2026, against ISPConfig 3.3.1p1 (the version Noiz runs) and the Roundcube webmail it provides. This guide is written for Noiz hosting and is kept current against ISPConfig and Roundcube. It complements, and does not replace, the official documentation linked below. Roundcube is updated regularly and its exact version, colours and the precise position of a button can shift between releases, so if a screen looks slightly different from the description here, the field names and the steps still hold.

Official Documentation Reference

• Roundcube Webmail (project home): the official site for the webmail application that powers Noiz webmail, with an overview of its features.
• Roundcube Documentation: the official documentation portal, including the bundled user help that explains composing, folders, contacts and settings.
• ISPConfig Documentation overview: the index of official ISPConfig documentation, including how mailboxes and webmail fit into the hosting platform.

Prerequisites

• A mailbox already exists for your domain. Webmail only signs you in to a mailbox that has already been created, so if you do not have one yet, first create an email mailbox in ISPConfig.
• You know the mailbox's full email address, for example [email protected], and the password that was set when the mailbox was created. On Noiz webmail the username is always the whole address, not just the part before the @.
• Your domain is live on Noiz hosting. If the domain was only recently pointed at Noiz, give DNS time to take effect; until it does, the domain-based webmail address may not resolve, and the fallback address described below is the reliable route in the meantime.

Webmail Is Not the Same as a Desktop or Mobile Email App

Before you sign in, it helps to be clear about what webmail is and is not, because the two ways of reading mail are often confused.

• Webmail (Roundcube) runs entirely in your web browser and on the Noiz server. There is nothing to install and nothing to configure: you open a web address, log in, and your mail is there. Because the messages stay on the server, webmail always shows the current, live state of your mailbox from any device you sign in from. It is ideal for occasional access, for a machine that is not yours, and for confirming that a brand-new mailbox works.
• A desktop or mobile email client such as Outlook, Apple Mail, Thunderbird or the Mail app on a phone is a separate program that you set up once with the mailbox's server settings. It then collects your mail into that program. Clients are better for heavy daily use, offline reading and managing several mailboxes at once, but they need to be configured with the correct incoming and outgoing server details first.

The two are not in competition: the same mailbox can be open in webmail and in a mail client at the same time, and (with IMAP) they stay in step with each other. That choice also decides what you can see: webmail always connects over IMAP, so it shows the server-side folders including Junk, whereas a client set up with POP3 will not see them. This article covers webmail only. If you would rather set the mailbox up in an app, that is a separate configuration task and uses the mailbox server settings rather than a web address.

Open Your Webmail

There are two reliable ways to reach the Roundcube login page. Try the domain address first; keep the server address in reserve for the situations described under Troubleshooting.

Route 1: The /webmail Address on Your Own Domain

In your browser's address bar, type your domain followed by /webmail, using https://:

https://yourdomain.com/webmail

Replace yourdomain.com with your real domain. If your site normally answers on the www host, https://www.yourdomain.com/webmail works too. This address is an alias that the Noiz server maps to Roundcube, and it is the easiest one to remember. It works when your website is served from the same Noiz ISPConfig server that hosts your mailbox, which is the usual arrangement.

Route 2: The Server Webmail Address

Noiz also publishes a server-level webmail address that does not depend on your own domain's website settings at all. This is the dependable fallback when the /webmail alias does not resolve, for example while a new domain's DNS is still settling, or when your website is hosted somewhere other than your Noiz mailbox server. The exact server webmail address for your account is listed in the welcome email that was sent when your hosting or mailbox was set up; if you no longer have it, Noiz support can give it to you. Bookmark whichever address works for you so you do not have to remember it next time.

Optional: The Webmail Icon in the ISPConfig Panel

If you are already signed in to the control panel, there is a third route. In ISPConfig, go to Email > Email Accounts > Email Mailbox for the mailbox list, where each row can carry a small webmail icon that opens Roundcube in a separate tab. Two things are worth knowing before relying on it. The icon is not always present: it appears only when the server-wide Link to webmail in Mailbox list option is switched on and a Webmail URL is set, and both are server settings rather than anything on your own mailbox. It is also a shortcut to the address rather than a sign-in, so it hands you the ordinary Roundcube login page and you still enter the mailbox address and its password yourself. This route needs a panel session, so if you take it, first log in to the ISPConfig control panel. Signing in to webmail itself, by contrast, does not use your ISPConfig panel login at all, as the next section explains.

Log In to Webmail

On the Roundcube login page, enter two things:

1. Username: your full email address, for example [email protected]. Entering only the part before the @ will fail.
2. Password: the mailbox password, the one set when the mailbox was created.

Click the login button and Roundcube opens on your inbox.

The single most common mix-up, worth stating plainly: webmail uses the mailbox's own email address and password. It does not use your ISPConfig control-panel username and password, and it does not use your Noiz client-area (billing) login. Those are three separate accounts. If you try to sign in to webmail with your panel or billing details, it will reject them even though nothing is wrong with your mailbox. Always use the email address and its mailbox password here.

A Quick Tour of Roundcube

Once you are in, Roundcube's layout is close to any modern email program, so most of it is self-explanatory. A short orientation:

• Folder list (left): your Inbox and the standard folders Drafts, Sent, Junk and Trash, plus any folders you create. Click a folder to see the messages in it.
• Message list (middle): the messages in the selected folder. Click a message to read it; the reading pane shows its content.
• Compose: the button to write a new message, usually at the top of the folder or message column. It opens a blank message where you fill in the recipient, subject and body, then click Send.
• Search: a search box above the message list finds mail by sender, subject or content within the current folder.
• Contacts (address book): stores email addresses so you can pick recipients without retyping them.
• Settings: the area (often a cog or gear icon) where you adjust preferences, manage folders, set up an identity or signature, and configure filters or an out-of-office reply. The exact options you see depend on which Roundcube features are enabled on your server; if a feature you expect is missing, Noiz support can confirm what is available on your plan.
• Log out: always log out when you finish, especially on a shared or public computer, using the logout control near your account name. Closing the tab alone does not always end the session.

To confirm the mailbox is fully working, send yourself a short test message and check it arrives, then reply to it. That proves both sending and receiving from webmail.

Troubleshooting

Most problems with reaching webmail come down to where your domain points and whether it has a valid certificate yet. Work through these in order.

• Symptom: yourdomain.com/webmail shows a "Not Found" page or your own website's error page. The /webmail alias only exists when your website is served by the same Noiz server that hosts your mailbox. If your domain's website is hosted elsewhere, or its A record points to another provider, the alias will not be present on that host. Use the server webmail address (Route 2) instead; it reaches Roundcube regardless of where your website lives.
• Symptom: the address does not load at all, or the browser cannot find the site. This usually means DNS for the domain is not yet pointing at Noiz, common in the first hours after a domain is added or transferred. Until DNS takes effect, use the server webmail address, which does not depend on your domain resolving. If your domain has been live for a while and still will not load, contact Noiz support to check the DNS.
• Symptom: a browser security or certificate warning (for example "your connection is not private", or a name-mismatch error) when you open yourdomain.com/webmail. A valid HTTPS certificate for your own domain may not have been issued yet, which is normal for a newly added domain, or you may have opened http:// instead of https://. Two fixes: make sure the address starts with https://, and use the server webmail address, which always presents a valid certificate. If you specifically need yourdomain.com/webmail to be free of warnings, allow time for the certificate to be issued for your domain, or raise a ticket if it does not resolve on its own.
• Symptom: the login page loads but rejects your details. Confirm the username is the full email address and that you are using the mailbox password, not your ISPConfig panel or Noiz client-area password. There is one exception to the full-address rule: ISPConfig allows a mailbox to be given a separate Login value in place of its address, so if the mailbox was created that way, the login name is that value and not the email address. If you are certain the password is right and it still fails, reset it in the Password field on the mailbox under Email > Email Accounts > Email Mailbox and try again with the new value.
• Symptom: the details are accepted but the mailbox will not open, or webmail reports that it cannot connect to the mail server. Webmail reads mail over IMAP, so it depends on IMAP being available for that account. ISPConfig has a per-mailbox Disable IMAP option on the Mailbox tab, and a mailbox with that ticked cannot be opened in webmail even when the address and password are entirely correct. Check that the box is clear, or ask Noiz support to check it for you.
• Symptom: webmail works but a message you sent to yourself lands in Junk. That is a spam-filtering result, not a webmail fault. What moves it is a mailbox-level rule in ISPConfig, Move Spam Emails to Junk folder on the mailbox's Mail Filter tab, acting on messages the spam filter has already tagged. It is not a Roundcube preference, so marking the message as not junk in webmail deals with that message but leaves the rule untouched. Mark it as not junk anyway, and if legitimate mail is regularly misfiled, contact Noiz support to review the filtering for your mailbox.

If webmail still will not open or accept your login after working through the above, open a support ticket with the Noiz support team. Include the mailbox's email address, the exact web address you are trying, and a screenshot of any error the browser or the login page shows. On Noiz managed plans the support team can confirm the correct webmail address for your account, check that the mailbox and its certificate are in order, and point you to the exact detail to correct.