[wp-hackers] How to throttle emails on hosts with email sending limits?

[William Canino]

One of my blogs is on 000webhost and I use Mark Jaquith's "Subscribe
to Comments" plugin among others and its hosting account was suspended
one night when a discussion, well, got out of hand.

000webhost's email sending limit is 'No more than 30 emails per 5
minutes and no more than 100 emails per hour.'

000webhost's PHP config doesn't support SSL/TLS so I can't send via
Gmail. In any case, Gmail also has a limit of "100 people at a time".

So as a stopgap I added a "ORDER BY comment_date DESC LIMIT 28" clause
to Jaquith's plugin and crossed my fingers.

Before I go study how to add the Throttle plugin to Swift Mailer and
use Swift as a wp_mail() replacement, I thought of coming here to ask
if someone has already made or begun a throttling solution or plugin.

A plugin like this may be interesting to write for public release
because, for example, in this case, 000webhost has two limits and
gmail has another kind of limit.

W

P.S. It amuses me how often various plugins just "do their own thing"
to send their mail.