Qingdao Sigma Chemical Co., Ltd (International, US, EU, Canada and Australia domestic

What messenger should I use then? What is accepted? I had email traffic 4 days ago and my proton worked.
Use any other email provider. A lot of the issues with proton come from having a long email conversation/replies re,re,re,re,re,tarted (a lot of back and forth). Sometimes you can delete the re's in the subject line and it will go through. If that doesn't work, start a new email chain "new message" and it should work. I use proton and never had a issue with qsc or any other dealer.
 
I’m going to post this again for all the people who are lazy and can't seem to search the thread for solutions to the Protonmail spam filter rejections.

SWITCH TO PLAIN TEXT.

Are proton replies still getting blocked by the spam filter?

If they are, try sending as plain text.

After you type up your reply email, at the bottom of the email window, click the ... next to the Hide toolbar button (looks like an underlined capital A).

Click "Plain text"
 
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Wow you're right, they used to carry this brand. Prices for this stuff really varies to the extreme.

Ok just curious I was looking at the right stuff. Now on the idea of Nad + online there varies some people use sodium chloride and some use bicarbonate. What’s the difference as far as Nad is concerned? Some seem to just be fine with normal bac water.
 
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