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Legacy client settings

If needed, users on our Personal and Pro plans can enable legacy connection protocols that may be required by older devices or clients, or to use as a “send as” address in services like Gmail. This also lets you keep using popular classic clients like Eudora – just switch to Auth-Email's legacy servers instead.

Once your email account has been authorized in the Auth-Email dashboard, change the settings in your email client, app or device to use the Auth-Email IMAP, POP or SMTP servers. Choose your server and port from the list below to match the email provider you are using. If needed, see our list of client setup guides for help finding and configuring the settings in your chosen client.

If you are unsure which details to use, check the Auth-Email dashboard, which will always show the correct server settings for each authorized account. You should always make sure the username you are using matches the authorized account (e.g., [email protected]). The password is the one you set when you authorized the account with Auth-Email, not your actual email account password.

You must have the “legacy SSL/TLS” toggle enabled in your Auth-Email dashboard to use the server details listed below, otherwise you will find that login attempts fail. If needed, you can mix and match the legacy server settings with the standard configuration. For example, you can use the legacy SMTP server with the standard IMAP or POP server for the same account.

Microsoft 365, Office 365, Exchange Online, Outlook, Windows Live Mail, and Hotmail

Configure your client to use the server outlook-legacy.auth-email.com

  • For IMAP, use port 993 (SSL).
  • For POP, use port 995 (SSL).
  • For SMTP, use port 465 (SSL).

If your client does not support TLS Server Name Indication (SNI), use the following ports instead:

  • For IMAP, use port 9931 (SSL).
  • For POP, use port 9951 (SSL).
  • For SMTP, use port 4651 (SSL).

If your client can only use opportunistic SSL/TLS (also known as STARTTLS), use the following ports instead:

  • For IMAP, use port 143
  • For POP, use port 110
  • For SMTP, use port 25 or 5871

Gmail and Google Workspace

Configure your client to use the server gmail-legacy.auth-email.com

  • For IMAP, use port 993 (SSL).
  • For POP, use port 995 (SSL).
  • For SMTP, use port 465 (SSL).

If your client does not support TLS Server Name Indication (SNI), use the following ports instead:

  • For IMAP, use port 9932 (SSL).
  • For POP, use port 9952 (SSL).
  • For SMTP, use port 4652 (SSL).

If your client can only use opportunistic SSL/TLS (also known as STARTTLS), use the following ports instead:

  • For IMAP, use port 1432
  • For POP, use port 1102
  • For SMTP, use port 5872

Microsoft 365 operated by 21Vianet

Configure your client to use the server 21vianet-legacy.auth-email.com

  • For IMAP, use port 993 (SSL).
  • For POP, use port 995 (SSL).
  • For SMTP, use port 465 (SSL).

Office 365 GCC High

Configure your client to use the server gcc-legacy.auth-email.com

  • For IMAP, use port 993 (SSL).
  • For POP, use port 995 (SSL).
  • For SMTP, use port 465 (SSL).

Fastmail

Configure your client to use the server fastmail-legacy.auth-email.com

  • For IMAP, use port 993 (SSL).
  • For POP, use port 995 (SSL).
  • For SMTP, use port 465 (SSL).

Yahoo and all Yahoo-branded providers (AT&T, Rogers, Comcast, Sky, etc.)

Configure your client to use the server yahoo-legacy.auth-email.com

  • For IMAP, use port 993 (SSL).
  • For POP, use port 995 (SSL).
  • For SMTP, use port 465 (SSL).

AOL and Verizon

Configure your client to use the server aol-legacy.auth-email.com

  • For IMAP, use port 993 (SSL).
  • For POP, use port 995 (SSL).
  • For SMTP, use port 465 (SSL).

Yandex

Configure your client to use the server yandex-legacy.auth-email.com

  • For IMAP, use port 993 (SSL).
  • For POP, use port 995 (SSL).
  • For SMTP, use port 465 (SSL).

VK Mail and Mail.ru

Configure your client to use the server vk-mail-legacy.auth-email.com

  • For IMAP, use port 993 (SSL).
  • For POP, use port 995 (SSL).
  • For SMTP, use port 465 (SSL).

Legacy Xfinity and Comcast (use Yahoo instead in most cases)

Configure your client to use the server comcast-legacy.auth-email.com

  • For IMAP, use port 993 (SSL).
  • For POP, use port 995 (SSL).
  • For SMTP, use port 465 (SSL).