email sending problem

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sometimes, some emails are not sent.

is there anybody can resolve this issue?

is this white domain related problem?

I want to send a mail through php to all email addresses, any host, any email provider.


I have a php function that send a mail through gmail. maybe through phpmailer library. It is included in [url removed, login to view] <-- this CMS

but when trying to send some emails maybe over 2~5, It is too late. <-- when using gmail. (which is also in php function. not direct gmail write)

This issue is related to the FIRST issue. and I want to send emails through my server. It can. but the reason of FIRST issue, I'm now using gmail.


I want to send mails after processing all my function logic. It is ajax request.

do I have to use thread like in php? because of speed. so it's not like cron job.

is there any best class or logic about thread in php?

attached file is the email infomation about FIRST and SECOND issue.

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