Electronic Mail Configuration
To login to webmail, please use the login page at mail.inter-corporate.com.
To find out how to create a new account or to learn more about our Electronic Mail services: www.inter-corporate.com/solutions/email
Mail server settings
Most configurations will use IMAP4 (for receiving messages) and SMTP (for sending). IMAP4 supports folders and synchronization with other eMail programs using IMAP4, including webmail (which uses IMAP4 behind-the-scenes). POP3 is an older protocol that is included here for special-use cases.
- IMAP4 server (receiving; protocol supports folders and synchronization)
Login name: full eMail address Hostname: mail.inter-corporate.com Port: 993 (fully encrypted; select SSL or SSL/TLS) Port: 143 (not encrypted; do not use this; select STARTTLS to enable connection upgrade to encrypt)
- SMTP server (sending)
Login name: full eMail address Hostname: mail.inter-corporate.com Port: 465 (fully encrypted; select SSL or SSL/TLS) Port: 587 (not encrypted; select STARTTLS to enable connection upgrade to encrypt)
If you're using using software that requires a POP3 configuration because it doesn't support the newer protocol (above), or is an automated system for which POP3 is a "spcial use case," then you will need to use these settings...
- POP3 server (receiving; older protocol)
Login name: full eMail address Hostname: mail.inter-corporate.com Port: 995 (fully encrypted; select SSL or SSL/TLS) Port: 110 (not encrypted; do not use this; select STARTTLS to enable connection upgrade to encrypt)
If the Calendar and Contacts (Address Book) services are enabled for your account (contact us for support), you will need to use these settings...
- CALDAV server (calendar)
Login name: full eMail address URI: https://dav.inter-corporate.com/ Port: 443 (fully encrypted) Port: 80 (not encrypted; do not use this; will be redirected to enforce encryption)
- CARDDAV server (contacts / address book)
Login name: full eMail address URI: https://dav.inter-corporate.com/ Port: 443 (fully encrypted) Port: 80 (not encrypted; do not use this; will be redirected to enforce encryption)
Note 1: To utilize the best level of modern encryption, always select the SSL or SSL/TLS option on all servers (IMAP4, POP3, and SMTP). Using encryption is an important security measure that helps to prevent unauthorized third parties from observing or intercepting your communications.
Note 2: To use the STARTTLS option the connection begins without encryption, which means some identifying information could be exposed (by the initial HELO or EHLO command), before the STARTTLS command is issued by your eMail software, which is needed to upgrade the connection before your login name and password are transmitted. Some older software that doesn't properly support the fully encrypted SSL/TLS options need to use this STARTTLS option instead.
Note 3: Unencrypted ports 110 (POP3) and 143 (IMAP4) will be phased out after we've assisted all clients with upgrading to encrypted connections. We anticipate this to be completed in late 2026 (we originally planned for 2025 but a significant number of clients need more time -- we are working with them to phase out some of their older equipment that doesn't support encryption).
Note 4: Unencrypted third-party-server-initiated SMTP sessions will be phased out after the majority of third-party SMTP servers consistently use encrypted sessions. There is presently no anticipated completion date for this.
For eMail services and support, please contact us.