Castles provides email for personal, group, or business-Castles Information Network

Email Hosting Services

Email hosting from, offers email for personal, group, business and outsourced email. Get secure email hosting, reliable personal service, and web email services. Our web email is full-featured and easily accessible.

For Email Server Settings & Password Requirements
See Bottom of Page

Important Notice
Castles email services is business class email and is intended for one-to-one emails or small working group email. It Is Not for mass emailing or for large group emails.

Due to issues relating to spam and blacklisting, Castles imposes restrictions on email.

Web Mail:
  • No more than 100 recipients in the To field.
  • No more than 100 recipients in the CC field.
  • No more than 100 recipients in the BCC field.
  • No more than 50 recipients to any given domain (unless that domain is same as that of sender).
  • No more than 900 off-domain recipients per 24 hour window for a given user.
  • No more than 500 off-domain recipients per hour for the IP used to connect to the web mail service.
  • No more than 900 recipients per message.
  • No more than 900 off-domain recipients per 24 hour window for a given user.
Please note that if an email address is reported multiple times as a sender of spam. Our system then logs the reports of spam reports without the recipients identifying information and automatically suspends the account. Repeated reports of this nature may result in permanent suspension of the account.

Also, some mailing programs have a hard limit of 300 recipients per message, 2000 characters for the header, or 998 characters in any of the fields (To/CC/BCC). Our rate limits are only for the per 24 hour period, not confined to what an email program is limited to.

For users that need to send out email above the restrictions, we recommend you use either Constant Contact or iContact
Password Requirements
  • At least eight characters in length
  • No more than 20 characters in length
  • Contain at least one number [0-9] character
  • Contain at least one special character from: !@#$%^&*()~`-=_+[]{}|:";',./<>?
  • Contain at least one upper-case and lower-case letter
  • Cannot match the account login name or email address
  • Cannot re-use any of your last 10 passwords.

Castles Email Server Settings
 Server Address Port
 IMAP (128-bit SSL) 993
 IMAP 143
 POP3 (128-bit SSL) 995
 POP 3 110
 SMTP* (Authenticated 128-bit SSL) 465
 SMTP* (Authenticated) 25, 2525 or 587

*The authenticated SMTP username and password is the same as your IMAP and POP username and password.