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

[Brad Williams]

The MailPress plugin has throttle control.  Might be a good place to  
start

Sent from my iPhone

On Oct 14, 2009, at 8:18 PM, William Canino <william.canino at googlemail.com 
 > wrote:

> I definitely ought to figure this out soon.
>
> I installed WordPress on Dreamhost today.  DH has a "100 recipients
> per hour" limit.
>
> Even without plugins, if the blog gets 101 comments in one hour,
> wordpress's "new comment" notification emails to the post authors will
> hit the limit.
>
> Therefore I will have to override wp_mail() itself.
>
> The new wp_mail() somehow needs to remember how many recipients have
> been sent in the last 3600 seconds.  Three ways to do this:
>
> 1. I have it accumulate emails unto a wp_option setting and with
> wp_schedule_event send just enough during the top of every hour. On
> the average they get it half an hour late.
> 2. I store each email as a record in a table, and record the sent
> times, all within a SQL SELECT-UPDATE-COMMIT transaction.  Thankfully,
> the emails don't have 2Mb attachments!
> 3. A better option?
>
> Sorry if ask again, guys, has anyone integrated mail queuing code to  
> WordPress?
>
>
>
>
> 2009/10/9 Art Delano <ajd at cloudiness.com>:
>> Would it be possible to make it work like this?
>> 1. Check if anything needs sending
>> 2. Concatenates all pending emails into a digested message
>>
>> This would reduce the number of mails sent to one per time window.
>>
>> Art
>>
>> On Oct 9, 2009, at 4:31 PM, Otto wrote:
>>
>>> Looking at the plugin, it appears to hook to comment_post to send  
>>> the
>>> notification emails.
>>>
>>> I'd rework it a bit. Change the comment_post hook to run a new
>>> function which does a wp_schedule_event to a new action (maybe
>>> stc_send_notifications?). Then hook that to a new function which  
>>> does
>>> the following:
>>> 1. checks to see if anything needs sending still
>>> 2. sends emails up to limit
>>> 3. if still some left, do another wp_schedule_event to rerun at some
>>> future period of time.
>>>
>>> -Otto
>>> Sent from Memphis, TN, United States
>>>
>>>
>>> On Fri, Oct 9, 2009 at 2:39 PM, William Canino
>>> <william.canino at googlemail.com> wrote:
>>>>
>>>> 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.
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