TrekMail Webmail Calendar: Events, ICS Import and Reminders

TrekMail webmail includes a calendar that lives alongside your inbox — no separate app to open, no account to connect. Use it to keep track of meetings, deadlines, and events that come in by email.

Opening the Calendar

Click Calendar in the top navigation bar. The calendar opens in month view, showing the current month with dots indicating days that have events.

Navigating the calendar

• Click the left and right arrows to move between months
• Click Today to jump back to the current month
• Click on any day to see the events scheduled for that date

Creating an event

1. Click on any date in the month view to open a new event form
2. Fill in the details:
   • Title — a short name for the event (required)
   • Date — pre-filled with the date you clicked; change it if needed
   • Start time and End time — leave blank for an all-day event
   • Notes — optional description, location, or anything else you want to remember
3. Click Save

The event appears on the calendar immediately with a coloured dot on that date.

All-day events: Leave the start and end time fields empty and the event is treated as an all-day entry. It appears at the top of the day rather than in a specific time slot.

Editing an event

1. Click the dot or event name on the calendar
2. Click Edit (pencil icon) in the event detail popup
3. Make your changes
4. Click Save

Deleting an event

1. Click the event on the calendar
2. Click Delete in the event detail popup
3. Confirm the deletion

Deleted events are removed immediately and cannot be recovered.

Responding to calendar invitations

When you receive an email that contains a calendar invitation (an .ics attachment or embedded meeting request), TrekMail webmail detects it automatically and shows three response buttons directly on the message:

• Accept — confirms you will attend
• Tentative — indicates you might attend
• Decline — declines the invitation

Clicking a button does two things:

1. Sends a reply to the invitation organiser so their calendar app records your response
2. Records your answer on the invitation in TrekMail webmail so you can see how you responded later

The response buttons appear on the message itself — you do not need to open the calendar tab. Your response is shown next to the buttons after you reply.

Note: The reply is sent from your default mailbox address. If you need another From address, choose it in the message composer or update the default under Settings → Sending addresses first.

Importing events (ICS files)

ICS is the standard format for calendar events — Google Calendar, Outlook, Apple Calendar, and most other calendar apps can export in this format. You can import ICS files into TrekMail webmail to bring events in from other sources.

Common reasons to import ICS files:

• A meeting invitation arrived as an .ics file attachment
• You want to bring events from Google Calendar or Outlook into your TrekMail calendar
• A conference or event website provided a downloadable calendar file

To import an ICS file:

1. Open the Calendar tab
2. Click the import icon (↥) in the calendar toolbar, then Import calendar (.ics)
3. Select the .ics file from your computer
4. TrekMail shows you a preview of the events it found
5. Click Import to confirm

Nothing is added to your calendar until you confirm. The preview tells you three things:

• New events — these will be added
• Already in your calendar — the same event from an earlier import, or one your phone already synced. These are skipped, so importing the same file twice does not create duplicates.
• Skipped items — tasks, notes and cancelled events, which the calendar does not store

Recurring events keep their repeat rule, all-day events stay all-day, and events keep the time zone they were exported in — a 9:00 meeting exported from London still reads 9:00 London time.

Imported events sync to your phone and desktop apps like any other TrekMail event — see Sync with phone, desktop, and other apps below.

Limits: a file can be up to 5 MB and hold up to 1,000 events. If your export is larger, export a shorter date range from your other calendar and import it in parts.

Tip: When you receive an email with a calendar attachment (.ics), you do not need to import it — open the message and use the Add to calendar button on the attachment.

Browser notifications

TrekMail can remind you about upcoming events with a browser notification — a small pop-up that appears even when webmail is not your active tab, as long as your browser is open.

To enable notifications:

1. Open the Calendar tab
2. Click Settings → Enable notifications
3. Your browser will ask for permission — click Allow

Notifications appear at the event start time by default. Once you grant permission, future events will trigger reminders automatically.

Note: Browser notifications only work while your browser is running. If your browser is closed or the tab is sleeping on mobile, notifications will not appear. For important reminders, consider also adding the event to your phone's native calendar.

To disable notifications:

1. Open Calendar → Settings
2. Toggle off Enable notifications

You can also revoke permission in your browser settings at any time.

Using the calendar on mobile

The calendar works in mobile browsers and adapts to a touch-friendly layout. You can tap dates to view and create events just as you would on desktop.

For the best mobile experience, install TrekMail webmail as a PWA (Progressive Web App) — this gives you a standalone app with the calendar accessible from your home screen. See the mobile and PWA guide.

Sync with phone, desktop, and other apps

The TrekMail calendar is a standard CalDAV calendar. That means you can connect it to Apple Calendar, the iPhone or iPad Calendar app, Android (via DAVx⁵), Thunderbird, and any other CalDAV-aware client. Events flow both ways — anything you create on your phone shows up in TrekMail webmail, and anything you create here shows up on your phone.

The same applies to contacts, which are exposed over CardDAV.

The settings are the same in every client: server trekmail.net, your full TrekMail email as the username, and your mailbox password.

Outlook is a special case. Microsoft does not support CalDAV natively. The Outlook guide covers the recommended third-party plugin and a couple of workarounds.

Frequently asked questions

Can I share my TrekMail calendar with other people? Calendar sharing is not currently available. The calendar is personal to your mailbox.

Will events I create on my phone show up in webmail? Yes — once you've connected your phone or desktop client (see the table above), changes flow both ways within the sync interval set by your client (typically a few minutes).

What happens to my calendar events if I delete my mailbox? Calendar events are tied to your TrekMail mailbox. Deleting the mailbox also removes all associated calendar data.

I imported the same file twice — did I create duplicates? No. Import matches events by the unique ID your other calendar gave them, so anything already in your calendar is listed as "already added" in the preview and skipped.

My import says some items were skipped — what were they? Tasks, notes and cancelled events. The TrekMail calendar stores appointments only, so those parts of an export are counted and reported rather than added.