E-mail

E-Mail clients

Native email client

Feel free to use your native email client, such as macOS Mail or Thunderbird. To configure the client, use the SMTP and IMAP connection settings.

Webmail

You can also manage your emails via our webmail.

Connection settings

SMTP

These are the SMTP (outgoing mail server) settings:

Setting	Option 1 (preferred; implicit SSL)	Option 2 (opportunistic SSL)
SMTP server	smtp.confirm.ch	smtp.confirm.ch
SMTP port	465	587
SMTP encryption	SSL (not STARTTLS)	STARTTLS
Username	{UID}@confirm.ch	{UID}@confirm.ch
Authentication	Password	Password

Important

The sender address must be your own mail address ({UID}@confirm.ch) or one of your personal aliases. You can also use sub-addressing (…+{sub-address}@confirm.ch) as long as it matches your own mail addresses. Sending with any other address is rejected by the server (553 5.7.1 … not owned by user).

Warning

SMTP port 25 doesn’t allow authenticated SMTP, and port 587 only allows authenticated SMTP with STARTTLS encryption. See the encryption docs for more information.

Hint

Technical (infrastructure) services will use the technical service@confirm.ch account. The credentials can be found in Vaultwarden under Service mail account.

The sender address should match the service+{sub-address}@confirm.ch format, or it will be rejected.

IMAP

These are the IMAP (incoming mail server) settings:

Setting	Value
IMAP server	imap.confirm.ch
IMAP port	993
IMAP encryption	SSL (not STARTTLS)
IMAP path prefix	«empty»
Username	{UID}@confirm.ch
Authentication	Password

These are the default IMAP folders:

Folder	Usage
Drafts	IMAP folder for drafts
Sent Messages	IMAP folder for sent mails
Deleted Messages	IMAP folder for deleted mail
Junk	IMAP folder for junk / spam mail
Archive	IMAP folder for archived mails
Notes	IMAP folder for notes
#sieve	Top-level Sieve folder for Sieve filters (hidden in IMAP)
#calendars	Top-level CalDAV folder for calendars (hidden in IMAP)
#addressbooks	Top-level CardDAV folder for address books (hidden in IMAP)

Note

• These folders should automatically be created by the server the first time you log in.

• It’s recommended to use the folder names above, so they’re identical on all IMAP clients (Webmail has already set those as default).

Signature

Please use the following email signature:

--
confirm IT GmbH
<Vorname> <Nachname>

Multergasse 12, CH-9000 St. Gallen, Switzerland
+41 44 500 25 05, <uid>@confirm.ch, www.confirm.ch

Important

Add a trailing whitespace after the dashes (--) like described in RFC 3676 section 4.3.

SPAM management

We’re using Rspamd as our SPAM solution.

Teaching SPAM & HAM

We’ve built our own rspamd-learner script, which helps teaching our SPAM filter Rspamd with SPAM & HAM (i.e. non-SPAM) emails. To do that, create the following two mailboxes:

• Learn as SPAM: Mailbox to teach Rspamd about SPAM

• Learn as HAM: Mailbox to teach Rspamd about HAM

The location of the mailboxes doesn’t matter, just the name must match (which is case-insensitive btw).

As soon as you get a SPAM email, drop it in the Learn as SPAM mailbox. When you get an email which is wrongly marked as SPAM, drop it in the Learn as HAM mailbox.

The IMAP server will immediately inform Rspamd about your decision.

Warning

• Please note that the rspamd-learner will delete SPAM emails immediately after teaching Rspamd. Thus, dropping a mail in the Learn as SPAM mailbox will get rid of it immediately!

• For the Learn as HAM mailbox, this behaviour is disabled.

• You can drop a mail into the Learn as HAM mailbox, and then move it out 1s later.

• You can also drop a copy of the emails into the mailboxes.

Note

Once Rspamd has learned an email from the Learn as HAM mailbox, it gets the HamLearned flag, so you know it’s safe to move it out again.

Trusted addresses

Sometimes Rspamd will flag emails as SPAM, so they get temporarily rejected (greylisting), or completely rejected. However, Rspamd may also incorrectly mark emails from senders we trust as SPAM. To avoid that, you can add email addresses to the trusted sender addresses map.