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Email programs that use POP3 and IMAP4 rely on SMTP to send messages. POP3 and IMAP4 email programs don't use POP3 and IMAP4 to send messages to the email server. Settings users use to set up POP3 or IMAP4 access to their Exchange Online mailboxesĪfter you enable POP3 and IMAP4 client access, you have to give users the information in the following table so that they can connect their email programs to their Exchange Online mailboxes. The proxy server first looks up the assigned pod server (client access server) and then authenticates against that. The delay results from using a proxy server, which introduces an additional hop for authentication.
#Sonic.net email settings pop3 Offline#
POP3 and IMAP4 provide access to the basic email features of Exchange Online and allow for offline email access, but don't offer rich email, calendaring, and contact management, or other features that are available when users connect with Outlook, Exchange ActiveSync, Outlook on the web (formerly known as Outlook Web App), or Outlook Voice Access.Įach time a person accesses a POP-based or IMAP-based email program to open his or her Microsoft 365 or Office 365 email, that user will experience a delay of several seconds. For information about features offered by specific POP3 and IMAP4 client programs, see the documentation that's included with each application. The features supported by each email client programs vary. Users can use any email programs that support POP3 and IMAP4 to connect to Exchange Online (for example, Outlook, Windows Mail, and Mozilla Thunderbird). Disabling Basic authentication will block legacy protocols, such as POP and IMAP.
#Sonic.net email settings pop3 password#
To protect your Exchange Online tenant from brute force or password spray attacks, your organization will need to Disable Basic authentication in Exchange Online and only use Modern authentication for Outlook in Exchange Online. For more information, see What are security defaults?. If you've enabled security defaults in your organization, POP3 and IMAP4 are automatically disabled in Exchange Online.