Re: Problem with xNewsletter
if you work with newsletters you have to take care about a few things:
1) if you use php sendmail function normally the provider has a limit how much you can send per hour/day. you have to look into your website host settings to find out this limit or to contact your hoster.
if you exceed this limit you get "failed-> Could not instantiate mail function."
it seems (what I see in your posting) you exceeded this limit, because once you reached it it doesn't matter whether you want to send 1 or 100 mail
2) if you use existing email via smtp then you have to check the limit of your email account
3) sending in blocks:
if you have e.g. a limit of 100 mails per hour you can set the preference to e.g. 90 every hour.
the first 90 mails are sended immediately, then xnewsletter is waiting for a new call.
the call must be done by cron.php
as XOOPS itself has no cron function you have to set it up e.g. in your hosting package. most of hoster which provides webspace and email provides also the possibility to set up a cron job. This external cron job must call cron.php each hour.
if you are not sure how to set up a cron job then ask your provider, because this is different in the various existing systems
for more information you should also read https://app.gitbook.com/@xoops/s/xnewsletter-tutorial/