GMail disagrees with you, because GMail users disagree with you. They are clicking "report spam" on your emails. Whether or not you think what you're sending is spam, the recipients think it is, and that's what matters. (Based on the other comments in this thread it's not hard to see why they might think so.)

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tzs 4 hours ago | parent [-]

Users definitely click "report spam" in large numbers on things that are not spam. At work we've long had problems of getting reported for spam when the only things we send are:

• A receipt when a person comes to our site and purchases something.

• Their license key if what they purchased requires a license key.

• Replies if they send email to customer support.

• If they have purchased an automatically renewing subscription we email a receipt after it renews or a notice that it was declined if the charge does not go through. This is required by the major credit card companies.

• If they have an automatically renewing subscription and they are on a plan other than monthly we send a reminder before it tries to renew. This is required by the major credit card companies and by the consumer protection laws in many jurisdictions.

	▲	crote 2 hours ago \| parent [-]
		> If they have purchased an automatically renewing subscription we email a receipt after it renews (..) This is required by the major credit card companies. The problem here is that "we are legally required to send it" and "our customers want to receive it" aren't necessarily the same thing. I'd probably be pretty annoyed by those if I had more than a few subscriptions!