Customer cannot receive order update emails

All of a sudden, I found out my customers cannot receive order update emails. The comments still show up in account admin. What is the problem? my site is https://www.roseforlove.com and https://www.thesbeauty.com

Enable archiving for a while to aid in seeing if ZenCart is generating the email
Once generated ZenCart passes it to the mail handler provided by your host and has no other influence

So is they are generated and passed, it would be settings - setup in your hosts email handler

admin > config > email options > Email Archiving Active? > true

kobra:

Enable archiving for a while to aid in seeing if ZenCart is generating the email
Once generated ZenCart passes it to the mail handler provided by your host and has no other influence

So is they are generated and passed, it would be settings - setup in your hosts email handler

admin > config > email options > Email Archiving Active? > true

yes, I enabled the Email archiving. And I installed email archive manager. I found there was no email arcived when I sent out order update emails. But I did see email record when I sent out newsletters and sent out email via Tool.

Only the order update emails have no record...

It happend to all my three websites. And all of them worked fine before....

which files control the order update email? Maybe I can reload them.

It happend to all my three websites. And all of them worked fine before....
I would be suspecting something else as all three could not have had the same file issue at one time

kobra:

I would be suspecting something else as all three could not have had the same file issue at one time

Because once I update the website, I update all three of them at the same time....

Because once I update the website, I update all three of them at the same time....
Well then use FTP and view files by modified date

Look for a dates around when you last knew it funbctioned