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Old 13 Jul 2021, 11:41 AM   #1
Senior Member
Join Date: Aug 2005
Posts: 135
CardDAV sync contacts to android problem

Hi, I've been using CardDAV-Sync by dmfs GmbH for years but lately it doesn't work. I can't add account to a new device. On the old one it still works but I'm migrating to a new phone. Their support didn't respond my email. You guys have suggestions or work around?
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Old 14 Jul 2021, 05:10 AM   #2
Join Date: Jan 2010
Location: Melbourne, Oz
Posts: 87
Is there a chance that the new one requires an 'app password'?

Trying to sync a calendar from your Fastmail account to a device via CalDAV can generate errors.
  1. Your username/password is wrong. Check caps lock isn't on, and for common visual errors like mistaking a 0 (zero) for an O (capital o), or a 1 (one) for an l (lowercase letter L).
  2. You are using your normal password, or your 2FA password. This doesn't work with a mobile device: you need to use an app password for CalDAV or CardDAV access.
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Old 14 Jul 2021, 08:16 AM   #3
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Join Date: May 2004
Location: Irving, Texas
Posts: 8,706
You need to file a Suport Request at:
Fastmail is migrating their support to a new tool see comments at the link above.

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Old 14 Jul 2021, 11:31 PM   #4
Essential Contributor
Join Date: Dec 2008
Location: Canada
Posts: 308
Fastmail has tested and recommends DAVx⁵ for both CardDAV and CalDAV synching on Android.

I use it. Works well for syncing Contacts, and via CalDAV does Calendar and even Reminder (VTODO) synching (todo's, with the app as UI).

Fastmail CalDAV service supports Reminders on the backend, even though Fastmail doesn't (yet) have a tasks UI. (Android) does todo's very, very well, and with DAVx⁵ syncs via Fastmail perfectly.
Alternatively you can sync directly with

On PlayStore

Last edited by pjwalsh : 15 Jul 2021 at 11:13 PM.
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