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.<p>Is there an alternative solution that gives close to 100% deliverability? (paid or free).
Amazon SES works well for me, you could probably use gmail SMTP as well (seems limited to 99 emails / day).<p><a href="https://www.digitalocean.com/community/tutorials/how-to-use-google-s-smtp-server" rel="nofollow">https://www.digitalocean.com/community/tutorials/how-to-use-...</a>