Outlook

Autodiscover

Outlook can auto-detect IMAP/SMTP/POP3 settings by looking at the domain's "autodiscover" DNS record.

SRV record

A typical SRV record looks like this:

• Service: _autodiscover

• Protocol: ._tcp

• Port Number: 443

• Host: host.name.com

• Priority: 0

• Weight: 0

BIND example:

Domain: _autodiscover._tcp
TTL: 14440
Record Type: SRV
Record: 0 0 443 host.name.com.

CNAME record

A typical CNAME record looks like this:

• Name: autodiscover

• TTL: 3600

• RR Type: CNAME

• Target: host.name.com

BIND example:

Domain: autodiscover
TTL: 14440
Record Type: CNAME
Record: host.name.com.

Please make sure to add either CNAME or SRV record in your domain's DNS zone to have the autodiscover feature in Outlook working.

CrossBox Standalone version exposes the autodiscover config for Outlook clients at:

https://host.name.com/autodiscover/autodiscover.xml

host.name.com is the hostname of the server where CrossBox is running.

Manual Configuration

If you don't want to use the autodiscover feature, you can still configure IMAP/SMTP/POP3 settings in Outlook manually.

Server Information

Account Type: IMAP
Incoming Mail Server: host.name.com
Outgoing Mail Server (SMTP): host.name.com

Logon Information

Username: email@example.com

Advanced Settings

Incoming

IMAP

Server Port Numbers

Recommended

Incoming Server (IMAP): 993
Type of connection: SSL

Optional

Incoming Server (IMAP): 143
Type of connection: TLS or None

POP3

Server Port Numbers

Recommended

Incoming Server (POP3): 995
Type of connection: SSL

Optional

Incoming Server (POP3): 110
Type of connection: TLS or None

Outgoing

SMTP

Server Port Numbers

Recommended

Outgoing Server (SMTP): 465
Type of connection: SSL

Optional

Outgoing Server (SMTP): 587
Type of connection: TLS or None (TLS for standalone and None for Cluster)