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by chinathrow 3169 days ago
You'll ned a dedicated IP as their free plans use shared IPs which are often flagged as spam sources.

Source: Tried the free plan a few times.
2 comments
NearAP 3169 days ago
If you use GAE, you get a free plan on SendGrid (up to a max) and I've used it to send mails to gmail and yahoo accounts. Don't recollect anyone ending up in spam but I haven't sent them in thousands. Will keep your comment in mind as I do so..
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nik736 3169 days ago
If your sending volumes are low a dedicated IP can be worse than shared IPs.
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