Example: Amazon SES now offers sending mail via SMTP (as well as an API). The typical settings for their SMTP server are as follows:
Server Name: email-smtp.us-east-1.amazonaws.com
Port:
25, 465 or 587
Use Transport Layer Security (TLS): Yes
SMTP user name: XRASRT565FGR8909
SMTP password: XRASRT565FGR8909XRASRT565FGR8909
I'm not sure if this is less strain on ZOHO's infrastructure than the usual sendmail. If it is less, then maybe users that enable this would have a larger limit on sendmail tasks. There should also be a button to click to test if the settings can connect.
Cheers,
John Whitney