Very Bad Customer Support Our company had multiple accounts with them and we started using Sparkpost but the company suspended all accounts at once and after discussing this I told them to refund but they didn't instead they stopped talking and closed the accounts.

SparkPost is one of the best places for… SparkPost is one of the best places for anyone looking for robust and reliable mail services. Great control panel, awesome metrics, and unrivaled API power and flexibility. I'm one of their happy customers since years, and going to remain for decades to come.

We barred them! They need to clean their act up! Over a long period we've frequently noted .sparkpostmail.com as the sender host for persistent spammers... which tells us the 'service' is basically unpoliced; undermining the credibility of legitimate users! This has been getting worse in the last year or so! - So frequent is the annoyance that we now BAR all email which has the string .sparkpostmail.com in any header via a Cpanel filter! I'd think twice about using this 'service' unless you want to find your messages trashed along with the Nigerian Princes, 'one weird tricks' and shonky viagra sales.

Horrible company that condones spammers… Horrible company that condones spammers and doesn't accept emails to their abuse email address advertised on the website. When you report a spammer they immediately reject the email to their abuse address. This company is in violation of the federal CAN-SPAM act and should be shut down by the FTC.

We have been using Sparkpost for… We have been using Sparkpost for delivery of one of our most important customers. The entire Sparkpost team is always there for our clients last minute needs and changes and makes what could be a difficult situation work exceptionally well. We love the Signal Analytics that comes with the account and hope to someday grow to where we can add in some more of the professional delivery services.