We may consider giving you a try. We currently have our servers setup to send via Postfix SMTP. Example config in Postfix:
Code:
smtp_sasl_auth_enable = yes
smtp_sasl_password_maps = static:username:password
smtp_sasl_security_options = noanonymous
smtp_tls_CAfile = /etc/nginx/ssl/star_aspiescentral_com.crt
header_size_limit = 4096000
relayhost = [smtp.sendgrid.net]:587
smtpd_tls_security_level = encrypt
Is this something supported by you?