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Free E-mail Relay for SonicWall 2nd factor VPN authentication and also copier scan-to-email

Moving away from an on premise Exchange 2010 Standard server to O365 mail. We currently have SonicWall 2nd factor VPN authentication, copier scan to email working. So, for now, I created a free gmail account and have setup Sonicwall second factor authentication without issue. Before I start setting up scan to email on our Kyocera copiers, I need to make sure I do not need to deal with security issues going this route.

The gmail account is setup using port 465 (SSL/TLS). I tried setting up the gmail account with google two factor authentication, but doing so caused issues/broke the SonicWall 2nd factor authentication. So, I disabled the google 2 factor authentication.

I wanted to use relay.appriver.com port 2525, but it did not work and kept failing.

I just want to ensure I do not create security issues.

J Spoor

you won't find a 3rd party open mail relayer, as those are used by spammers and end up on blacklists

if you have a windows server on prem, you can use IIS' smtp server

cmp119

ASKER

That's what is setup now. Moving to O365.

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J Spoor

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cmp119

ASKER

I understand, but the only problem with that is it will be used to serve as VPN 2nd factor authentication. So, for example, let's all office servers were powered down due to power failure, storm, etc. Since all internal servers (Exchange, IIS) were powered down then I could not be able to establish the VPN since there is no server available to send the 2nd factor authentication.

J Spoor

contact your ISP, they normally have an SMTP server that will allow relaying

cmp119

ASKER

Thanks for your help.