: Make sure your SMTP server is not configured as an open relay (test) It's possible that Gmail will flag an email as SPAM if it matches an email previously flagged as SPAM. So it's possible

@Dunderdale272

Make sure your SMTP server is not configured as an open relay (test)

It's possible that Gmail will flag an email as SPAM if it matches an email previously flagged as SPAM. So it's possible that if you're sending to the same Gmail account, your changes haven't made a difference if the original email from that sender was already flagged as SPAM (since it's been 'flagged' by Gmail already). Check any previous messages, and try clicking "Not SPAM". Better yet, try sending to multiple Gmail accounts.

Other potential problems areas to test might include:


Ensure the sender address matches the domain that the links are
pointing to.
Try reducing the number of links in the email
Try removing the link target attributes (which might be unnecessary
anyway)
The CAN-SPAM act makes it illegal to distribute emails without
clear unsubscribe options.
The CAN-SPAM act requires a physical mailing address for the
sender (I believe it's still considered within legal realm to use a
PO Box, but some servers might regard this as another flag)

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