April 15, 2016
Summary: Microsoft is deprecating(discontinuing) the DeltaSync protocol supported by Windows Live Mail
- DeltaSync is an email protocol used in Windows Live Mail(2012, 20111, 20091) for Sending and Receiving mail
- DeltaSync supported Outlook.com type email accounts(Outlook.com, Live.com, Hotmail.com, and MSn.com)
- DeltaSync provided synchronization of email messages and folders/sub-folders between the Outlook.com type accounts configured in Windows Live Mail and the corresponding account’s web based Inbox.
- Sending, Receiving, and Synchronization will cease to function once an Outlook.com type account is migrated to the new backend server on the Office 365 Platform
- For those using the DeltaSync protocol in Windows Live Mail 2012 switch to one of the other two protocols(IMAP or POP3) – See ‘How-To’ sections below
- IMAP supports synchronization of messages, folders, and subfolders between the local client(Windows Live Mail 2012) and the Outlook.com type account(Outlook/Hotmail/Live/MSn.com) web based INBOX
- POP3, does not support synchronization of messages, folders, subfolders between the local email client and the account’s web based INBOX. (NOTE: To use POP3 in a local client, the POP3 setting must be enabled in the account’s web based user interface(UI) Settings).
- POP3 and IMAP settings for Outlook.com type accounts(Outlook.com/Hotmail.com/Live.com/MSN.com)
IMAP server name imap-mail.outlook.com
IMAP port 993
IMAP encryption method SSL
POP server name pop-mail.outlook.com
POP port 995
POP encryption method SSL
SMTP server name smtp-mail.outlook.com
SMTP port 587
SMTP encryption method TLS
April 15, 2016: Initial Draft and Publish Date
April 16, 2016: Added Footnote  – Windows Live Mail 2011 and 2009 are no longer supported by Microsoft
April 17, 2016: Added comment and link for requirement to enable POP3 in the account’s web interface Settings.