Ask us anything about email — deliverability, outreach, hosting.
I'm the co-founder of GreenmorMail — a business email platform built on AWS SES with outreach, team chat, AI, and video conferencing inside the inbox.
We're relaunching on Product Hunt soon with a lot of new features, and before we do, I wanted to open the floor.
We've spent the last year deep in email infrastructure — SPF, DKIM, DMARC, bounce handling, deliverability tuning, bulk sending, cold outreach sequences, white-label hosting, IMAP/SMTP, the works.
If you have questions about any of it, ask below. Happy to go as deep as needed.
→ Cold email deliverability and domain health
→ AWS SES vs other sending infrastructure
→ Setting up outreach sequences without burning your domain
→ White-labelling email hosting for clients
→ Email infrastructure at the foundation level
→ Anything else email
Drop your question. 👇
Replies
Let's say a cloud domain is black listed. Your application sends email alerts via the domain but always lands in spam folders, how do you overcome this technical challenge with your product?
Greenmor Mail
@richatsealedvault ---
I wish there was a magic wand to fix this, but there isn't.
If the domain has been used to spam, most ESPs have a long memory. Easiest path forward is a fresh domain.
If you're already on a new domain, reputation assessments take time and vary across ESPs.
As a general rule: make sure SPF, DKIM, and DMARC are properly configured before sending anything. And keep your transactional/alert emails on a separate mailbox and domain from your outreach emails.
Warm up the new domain gradually. Start low volume, keep bounce rates tight, avoid spam traps.
This is also partly why we built GreenmorMail on AWS SES. Your domain reputation is yours to manage, but the IP reputation you're sending from is Amazon's, and that carries weight with every major ESP out of the box.
@niyatisethia Thank you for your response. I experienced this problem while working on Google's Firebase for my project. It was almost impossible to solve but I have proprietary work-around when the domain is black listed but you have no other choice and you're 100% right, it requires a separate new domain.
real question: what's your honest framework for warming a new SES sending IP from zero to 5K emails/day without burning the domain?
i've watched 3 startups (including one i advised) end up on Spamhaus by month 2 because they ramped too fast. every "best practices" article says "start with 50/day and double weekly." that's exactly what got them blacklisted.
there has to be a tighter playbook around engagement signals (open rates, click ratios, complaint thresholds) that determines when you can actually 2x. if you've published one, i'd buy you a coffee for the link.
Greenmor Mail
@thenameisarian It is important to understand that while you've warmed up your domains, created the right template, separated the bulk sending from your regular business email setup, the underlying infra for email remains the same.
That means whether you use SES, GWS, or M365 or any other reputed provider, your activity, if unsolicited, will be marked negatively. Two main reasons ESPs don't want their users to be spammed, and the big tech would rather that you use their ad eco-system to reach to new users.
That said, smaller businesses that want to outreach, but not blast mails into oblivion, should do this:
Stick to 2-3 mailboxes per domain. Not more than 15-20 emails per day per mailbox ever.
Warming up is important, but we have seen that warmup tools don't really make a dent (tried 3 major providers). I would instead say, warmup like a business would - take quotes, ask for help, sign-up and interact around the business services. Then reach out to prospects.
As much as we love metrics and expect them to guide us correctly, they rarely do. Instead of focusing on click/open/xyz rates, focus on replies and complaints. That will help you understand better if your outreach is being taken well.
@niyatisethia For cold outreach, where do you usually draw the line between “warming up slowly” and “moving too slowly to learn anything”? I’ve seen people follow generic warmup advice and still hurt the domain, so I’m curious what signals you actually trust before increasing volume.
Greenmor Mail
@alpertayfurr When you treat outreach as something you want to get in front of as many prospects as soon as possible, you will invariably burn the domain.
Treat it as a part of regular business communication instead, and you naturally become more careful about how you appear to prospects.
When you do this:
How you warm up the mailboxes becomes just as important as how long.
Warming up isn't a setup activity, it should be a continuous part of outreach.
You'll wait forever if you wait for 100% inbox placement.
The signal that tells you you're ready to increase volume is complaint rate over 2-3 weeks of warming. Keep it under 0.1% at current volume and you can step up. If it's creeping above that, more volume won't fix it. Your list quality or your copy needs work first. Bounce rate is the other one to watch early: above 3% on a fresh domain and you're moving too fast regardless of what the calendar says.