The conversion to Fastmail has disabled your old mail  – let’s get you back up and running as fast as we can!

 

How to set up your device or client for fastmail

If you have not received information from CompanyV regarding your fastmail account please contact us!

If you have your fastmail login information this page contains information on setting up mail clients on computers and other devices.

Before setting up your account on other devices please log into your account to confirm your username and password are correct.

Note: Every external program or app needs its own app password to access your information. If you use your normal password or your two-step verification password, you will see a password error.

Mobile app

If you have an iPhone, iPad, iPod, or Android device, we recommend the official Fastmail app.

Download on the App Store Get Fastmail on Google Play

The app works on iOS 10.x+ and Android 5.x+ devices. Your device must be online to access your information. Users who don’t meet these requirements can still use the web interface, fully compatible with mobile browsers, at https://www.fastmail.com.

How to set up your iPhone, iPad or iPod Touch: iOS 12

If you would like to you use another app, please select your device below:

On iOS devices, Fastmail has support for push notifications.

 

Adding a new third party app

If want to use your Fastmail account with any non-Fastmail service such as your mail client or desktop calendar, then you will need to create an app password specific to that service. To generate an app password:you need to login to your Fastmail account and use the arrow in the upper left to go to settings.

Desktop Set ups

Mac OS X Mail, Calendar, and Contacts

(require an app password)

Settings for new account in outlook.to replace old account.

1)      Go to accounts and note where your pst file is located on your old account – you want to set this for new account.

2)      Remove the old account

3)      Set up a new account

4)      Your fastmail address is your username for logon information

5)      The generated app password is the password

6)      Check Remember password

7)      You will use same logon for incoming and outgoing later

These are the rest of settings

Chose IMAP or POP

Incoming server for POP

pop.fastmail.com

Incoming server for IMAP

imap.fastmail.com

outgoing server (for both)

smtp.fastmail.com

Logon information
username is fastmail account something@fastmail.com
password must be the  the generated APP PASSWORD

more settings:

check: My outgoing server requires authentication

select Use same settings as my incoming server

Advanced

incoming server port 995

CHECK this server requires authentication

outgoing server (SMTP)   port 465

use the following type of encryption SSL

Help with outlook

https://www.fastmail.com/help/clients/outlook.html

There is an app for mobile

https://www.fastmail.com/help/clients/mobileapp.html

Server names and ports

These are the standard server name and port details for setting up access to email, contacts and files for your Fastmail account.

You will need to get an app password to connect to these servers. You cannot use your regular Fastmail password.

If you are looking for step-by-step set up instructions to set up your email software, please review our page on how to set up an email client, or see our instructions on setting up files access.

Troubleshooting:

Email

We recommend using IMAP over POP to access your email. Fastmail supports both protocols using the configurations below. You must use SSL/TLS with all of the protocols; we do not support insecure access.

All mobile devices should use IMAP.

You may want to use POP for your desktop.
This setup will create a new PST file in Outlook.

IMAP

Server imap.fastmail.com
Port 993
SSL/TLS Encryption Enabled, but not STARTTLS
Username Your Fastmail email address, including the domain.
Password Your app-specific password. You cannot use your regular Fastmail password.
Root folder/IMAP path prefix (leave blank)
Folder separator / (forward slash)

Note: Do not enable secure password authentication (SPA). It is not needed when you use SSL/TLS encryption and it will not work.

POP

Server pop.fastmail.com
Port 995
SSL/TLS Encryption Enabled, but not STARTTLS
Username Your Fastmail email address, including the domain.
Password Your app-specific password. You cannot use your regular Fastmail password.

POP from folder. By default, POP will pull emails from your inbox. You can pull emails from a different folder by adding the folder name to your username. For example, yourusername+foldername@fastmail.com. This won’t work for folder names with spaces or special characters.

SMTP

Server smtp.fastmail.com
Port 465
SSL/TLS Encryption Enabled, but not STARTTLS
Authentication PLAIN
Username Your Fastmail email address, including the domain.
Password Your app-specific password. You cannot use your regular Fastmail password.

If your client supports STARTTLS only, you can use port 587 with STARTTLS enabled.

Calendar

Fastmail supports two-way sync of your calendar via the standard CalDAV protocol. This is supported natively by iOS and many desktop calendar applications, and via a plugin on Android devices.

CalDAV access is not available on legacy Personal/Family Lite/Full plans or legacy Business Basic plans.

CalDAV

For clients that support auto-discovery of calendars over CalDAV, use the following details. However, there are some clients that do not support auto-discovery, and they require more work to set up. We have written step-by-step instructions for popular clients.

Server https://caldav.fastmail.com/
SSL/TLS Encryption Yes (required)
Username Your Fastmail email address, including the domain.
Password Your app-specific password. You cannot use your regular Fastmail password.

Contacts

Fastmail supports two-way sync of your contacts via the standard CardDAV protocol. This is supported natively by iOS and many desktop address book applications, and via a plugin on Android devices.

We also support read-only access to your contacts via the LDAP protocol, which works with some popular mail clients.

CardDAV access is not available on legacy Personal/Family Lite plans or legacy Business Basic plans.

CardDAV

The following details are sufficient for clients that support auto-discovery of contact lists over CardDAV. However, there are some clients that do not yet support this, and they require a little more work to set up. We have written step-by-step instructions for popular clients.

Server https://carddav.fastmail.com/
SSL/TLS Encryption Yes (required)
Username Your Fastmail email address, including the domain.
Password Your app-specific password. You cannot use your regular Fastmail password.

If your client does not support CardDAV auto-discovery, you may need to use a full URL path to your contact list.

  • personal contacts:
    • server address: https://carddav.fastmail.com/dav/addressbooks/user/<username@domain.tld>/Default
      • Replace <username@domain.tld> with your full Fastmail username, including the domain.
      • Example: for trythis@example.com the address is https://carddav.fastmail.com/dav/addressbooks/user/trythis@example.com/Default
    • username: <username>+Default@<domain.tld>
      • Note the additional +Default between your username and domain.
      • Example: for trythis@example.com the username is trythis+Default@example.com
  • shared contacts:
    • server address: https://carddav.fastmail.com/dav/addressbooks/user/<username@domain.tld>/<masteruser@domain.tld>.Shared
    • username: <username>+Shared@<domain.tld>
      • Note the additional +Shared between your username and domain.
      • Example: for trythis@example.com the username for shared contacts is trythis+Shared@example.com
      • Still use your Fastmail username and an app password to authenticate.

LDAP

You can view your contacts (read-only) in other software, like Outlook or Apple Mail, using LDAP.

Server ldap.fastmail.com
Port 636
SSL/TLS Encryption Enabled (but not STARTTLS)
Username/Bind DN cn=your-username@your-domain,dc=User
Login PLAIN
Password Your app-specific password. You cannot use your regular Fastmail password.
Search base/Base DN dc=AddressBook

The values are case sensitive. It must be exactly ,dc=User on the end of the username part, and the search base must be exactly dc=AddressBook.

LDAP notes

  • The contacts are read-only via LDAP, so you can’t make changes or add addresses from your email program; you must log in to the web interface to make changes.
  • The contact list is cached in the LDAP server for efficiency. It may take several minutes for changes to appear.
  • The contact list is not cached offline, so it will only work while you are connected to the internet.
  • Some items with an invalid format may not appear in LDAP. For instance, LDAP defines the format of fax-numbers, and they can’t contain an “@” in them. If you set up a fax number that’s an efax or similar, it won’t appear because it does not follow LDAP standards. The work around is to set it as an email address instead.
  • LDAP is most useful for businesses that have a large global address book. In these cases, the LDAP address lookup will search the user’s private contacts as well as the global contacts.

Files

You can access and manage your account’s files using either WebDAV or FTP. Most modern browsers will allow you to view files through either but you may want to install a standalone client to help manage or modify your files. You can read more about this in our instructions of how to set up remote file access.

WebDAV

Server https://webdav.fastmail.com/
Username Your Fastmail email address, including the domain.
Password Your app-specific password. You cannot use your regular Fastmail password.

Your {My Files} directory will be located in /username.your.domain/files/. Alternatively, use the hostname https://myfiles.fastmail.com/ to be rooted in your {My Files} directory.

FTP

Server ftp.fastmail.com
Port 21
Username Your Fastmail email address, including the domain.
Password Your app-specific password. You cannot use your regular Fastmail password.

Your {My Files} directory will be in /username.your.domain/files/. Fastmail also support FTPS, but not SFTP.

Alternative usernames

You need to log in to all services with your full Fastmail username, including the domain, for example username@your.domain. You must use the username you used to sign up your account; aliases will not work.

Because some software has difficulty with the @ symbol in usernames, you can try any of these alternatives:

  • username@your.domain
  • username#your.domain
  • username/your.domain
  • username=your.domain

Firewall access

If you are behind a firewall, some service ports may be blocked. Fastmail has a special proxy system whereby you can access IMAP, POP and SMTP through any port number. All these servers use SSL/TLS. The server names are:

IMAP imaps-proxy.fastmail.com
POP pops-proxy.fastmail.com
SMTP smtps-proxy.fastmail.com

If you use these server names, you can use any port to access these services. Commonly open ports include 80, 21, 25 and 443.

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