Hi, welcome and thank you for your question. My name is ***** ***** I am glad to assist you today.
For this kind of mailing, it is highly recommended that you use a legitimate mailing service designed and built for mass mailing. These kinds of services have several features that you will benefit from.
To get you started, I will recommend to you MailChimp.
MailChimp is a legitimate mailing service that you can use to send out emails in bulk without fear of being tagged as spam. This is because their mailing technology is equipped with tools and protocols that abide digital technology laws and regulations.
And YES, when using MailChimp, you can set your emails to be coming from your website.
The other good thing about using such services as MailChimp are the following:
To know more about MailChimp, please use this link below:
There are also other mass mailing services that realtors use apart from MailChimp but I highly recommend MailChimp. You can browse and read Mailchimp's features using the link I gave you above.
One good competitor with MailChimp that you can also review and try is Constant Contact. Here is their link:
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