glenscott1

I am currently using SendGrid, but the deliverability of messages is around 85%. It seems that if you use their free plan, the IP addresses used are shared between other free users and that opens up the possibility of abuse that affects all other free users.

Is there an alternative solution that gives close to 100% deliverability? (paid or free).

I have a requirement to set up a private email list for around 20 users. I have a Linode server on which to self-host the software. Many, many years ago, I used to run a Majordomo mailing list, so I am looking for something similar. It needs to be completely email controlled -- e.g. you can subscribe, unsubscribe and post via email. Web interface is not required. Open source preferred.