I played around a bit with sending via SES and Sendgrid. I generally found that deliverability on either of those was actually worse than even one of my slightly dirty IPs.
Previously, I was also using Sendgrid as well. But they seemed to start doing the "growth at any costs" bullshit which for an email sending company means accepting and delivering spam. (Regardless of their PR/weasel-words these places use to deny it, that's what it comes down to). Thus lots of places now just drop all mail that comes from Sendgrid, no workaround.
When that happened, a friend pointed me to smtp2go, which I've used since personally and we now use at work. We haven't (yet) had anything blocked as spam (less than 10k emails sent a month though), so it seems like they've not done the "growth at any costs" bullshit like Sendgrid.
You're not the first person I've heard say that. It's interesting that we haven't faced that issue. I wonder if we'll get a nasty surprise the next time we try as it has been a while since the last time we did it.
Previously, I was also using Sendgrid as well. But they seemed to start doing the "growth at any costs" bullshit which for an email sending company means accepting and delivering spam. (Regardless of their PR/weasel-words these places use to deny it, that's what it comes down to). Thus lots of places now just drop all mail that comes from Sendgrid, no workaround.
When that happened, a friend pointed me to smtp2go, which I've used since personally and we now use at work. We haven't (yet) had anything blocked as spam (less than 10k emails sent a month though), so it seems like they've not done the "growth at any costs" bullshit like Sendgrid.