I don't see it as a which provider issue. If you receive email you will receive spam from all over. On the receiving end, I treat providers differently based o

I don't see it as a which provider issue. If you receive email you will receive spam from all over. On the receiving end, I treat providers differently based on what we get. I see a lot of phishing and advertising from SES but we use Amazon so I can't reject it. I almost exclusively see phishing attempts from SendGrid so I outright reject email from SendGrid. So many things and people use gmail that I can't block gmail but I do increase its spam score. I see phishing attempts from gmail accounts almost every day, I report them to Google. Its the phishing that worries me most, seems incredibly easy to sign up for a service like SendGrid and start phishing people. Not one of these email service providers can/will globally block recipients in its network - one is forced to play a game of whack-a-mole, which means the bad guys always win. In terms of outbound email, I have a very Dilbert answer for you. The marketing guy picked Constant Contact and we use that. I have no idea how good deliverability is with CC vs anyone else. We use an opt-in email list, don't send a lot of communications, and immediately honor opt-outs.