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._tcpTTL: 14440Record Type: SRVRecord: 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: autodiscoverTTL: 14440Record Type: CNAMERecord: 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: IMAPIncoming Mail Server: host.name.comOutgoing Mail Server (SMTP): host.name.com

Logon Information

Username: email@example.com

Advanced Settings

Incoming

IMAP

Server Port Numbers

Recommended

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

Optional

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

POP3

Server Port Numbers

Recommended

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

Optional

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

Outgoing

SMTP

Server Port Numbers

Recommended

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

Optional

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