Domain Name Email Forwarding Is Becoming Unreliable — What You Need to Do

Is your forwarded email disappearing, bouncing, or going to spam?

If you have a domain name registered with KartHost and you use the Email Forwarding feature on that domain — meaning you set up an address like info@yourdomain.com to forward to your personal Comcast, Yahoo, Gmail, or other inbox, with no actual mailbox at your domain — this article is for you.

Domain name email forwarding failures are not from any KartHost change. New industry-wide email security standards have made this feature increasingly unreliable and beyond our ability to fix or support.

KartHost has a solution ready for you — and we will handle the DNS setup. Keep reading.

In This Article

1. Why Domain Email Forwarding Is Failing
2. The Hidden Reply Problem
3. Your Solution: A Real Hosted Mailbox
4. What To Do Right Now
5. Accessing Your New Mailbox
6. If You Still Want to Read Email in Yahoo or Gmail
7. We Are Here to Help

Why Domain Email Forwarding Is Failing

1. Comcast handed its email over to Yahoo

Starting June 2025, Comcast began migrating all @comcast.net mailboxes to Yahoo Mail's infrastructure. Your @comcast.net address stays the same, but Yahoo now controls spam filtering and delivery. Yahoo enforces authentication standards far more strictly than Comcast's old system.

Important for Comcast customers: When your migration invitation arrives, you must accept Yahoo's Terms of Service within 120 days or your account is permanently closed and your address is gone. Forwarding rules you had set inside Comcast's old webmail do not carry over. They must be recreated inside Yahoo Mail after migration.

2. Major email providers now strictly require authentication — and forwarding fails it

Since early 2024, Google, Yahoo, and Microsoft have enforced stricter SPF, DKIM, and DMARC authentication requirements on incoming mail. When someone emails info@yourdomain.com and Enom forwards it to your Comcast, Yahoo, or Gmail inbox, the destination provider checks whether Enom is authorized to send on behalf of the original sender. In most cases, the answer is no, so the message is rejected or sent to spam.

Adding SPF, DKIM, and DMARC records to your own domain cannot fix this. Those records authenticate mail you send. They cannot fix what Yahoo, Gmail, or others do with mail arriving through Enom's forwarding servers from third-party senders.

The root cause is simple: Enom's domain forwarding does not support SRS (Sender Rewriting Scheme), which is the mechanism that helps forwarded mail pass modern authentication checks. There is no DNS-level workaround.

3. This is not a KartHost issue — it is an industry-wide change

Domain email forwarding is being retired or restricted across the email industry because modern authentication and anti-spoofing requirements make it unreliable. This is happening across providers and institutions, not just at KartHost. Domain email forwarding is not a feature with a bug. It is a feature the modern internet has moved past.

There Is Another Problem You May Not Have Noticed

When Enom forwards a message to your Comcast, Yahoo, or Gmail inbox and you click Reply, your reply goes out from your @comcast.net, @yahoo.com, or @gmail.com address — not from info@yourdomain.com. That means customers see your personal inbox address instead of your professional domain address. Forwarding has always worked this way. A real hosted mailbox fixes that completely.

Your Solution: A Real Hosted Mailbox at Your Domain

Replace domain email forwarding with a real hosted email mailbox. KartHost offers two options:

Option A — KloudEmail (Hosted Business Email)
Business-class email powered by Rackspace. No ads, no tracking, full IMAP/SMTP access, generous storage, and solid deliverability. It supports unlimited email aliases at your domain, so all your existing addresses such as info@, sales@, and support@ can deliver to your real mailbox at no extra cost.
Compare KloudEmail Plans

Option B — Microsoft 365
Exchange-powered email plus the full Microsoft 365 suite, including Word, Excel, PowerPoint, Teams, and OneDrive. It supports up to 400 email aliases per user at no additional cost. All your existing forwarding addresses can be recreated as aliases.
Compare Microsoft 365 Plans

What To Do Right Now

1. Purchase a KloudEmail or Microsoft 365 mailbox through the KartHost Customer Center and compare plans using the links above.
2. Open a support ticket in the KartHost Customer Center. KartHost will handle the DNS reconfiguration to connect your domain aliases to your new mailbox correctly.
3. If you use Comcast or Yahoo, after your Comcast account migrates to Yahoo, you can configure Yahoo to pull mail from your new KloudEmail or Microsoft 365 mailbox. When you reply, your domain address — not your Comcast or Yahoo address — will appear as the sender.
4. Update your team if needed. Anyone sending to your domain aliases does not need to change anything. Your addresses stay exactly the same.

Accessing Your New Mailbox

On Desktop or Laptop — Use a Professional Email Client

• Mailbird — clean, fast, Windows. Free version available. mailbird.com
• Thunderbird — free, open source, Windows and Mac. thunderbird.net
• Microsoft Outlook — included with Microsoft 365 and already on most Windows computers.

All three can connect to KloudEmail or Microsoft 365 using IMAP. Open a support ticket and KartHost will provide the exact settings.

On Your Phone or Tablet — Use the Built-In Mail App

iPhone or iPad: Settings > Mail > Accounts > Add Account > Other > Add Mail Account. Enter your name, domain email address, password, and the IMAP settings KartHost provides.

Android: Open the Gmail app or your built-in Email app, choose Add Account, then enter your domain email address and the IMAP settings provided by KartHost.

If You Still Want to Read and Send Email in Yahoo or Gmail

You can configure Yahoo Mail or Gmail to send and reply from your domain address, so recipients always see your professional address. This requires your KloudEmail or Microsoft 365 mailbox to already be set up.

Important — KloudEmail Webmail Setting:
If you have ever set up forwarding inside KloudEmail webmail using Settings > Incoming > Forward, log in and confirm the Keep a copy in inbox checkbox is checked. If it is not checked, forwarded mail is deleted from the server immediately and your email client will find an empty inbox.

Yahoo Mail — Send From Your Domain Address

1. Log into Yahoo Mail at mail.yahoo.com.
2. Click the gear icon, then choose More Settings, then Mailboxes.
3. Select your added mailbox.
4. Under sending settings, enter your domain email address and SMTP credentials.

KloudEmail SMTP: secure.emailsrvr.com | Port: 465 | SSL: Yes

Full Yahoo instructions: https://help.yahoo.com/kb/add-remove-email-accounts-yahoo-mail-sln26459.html

Gmail — Send From Your Domain Address (Send mail as)

1. Log into Gmail and click the gear icon, then choose See all settings.
2. Open the Accounts and Import tab, then under Send mail as, click Add another email address.
3. Enter your name and domain email address.
4. Enter the SMTP server details shown below.
5. Gmail will send a verification email to your domain mailbox. Click the link to confirm.
6. When composing in Gmail, choose your domain address from the From dropdown.

KloudEmail SMTP: secure.emailsrvr.com | Port: 465 | SSL: Yes

Full Gmail instructions: https://support.google.com/mail/answer/22370

Note: Even with Send mail as configured in Yahoo or Gmail, we still recommend transitioning fully to a professional email client or direct mailbox access over time. It gives you a cleaner, faster experience and keeps your business email working consistently across all your devices from one professional mailbox.

KartHost support covers your KloudEmail mailbox and DNS configuration for domain names hosted at KartHost. Once mail leaves our server to a third-party app or service, support for that experience rests with that platform.

We Are Here to Help

KartHost has provided email and domain solutions since 2000. We understand how frustrating it is when something that has worked reliably for years suddenly stops, even though you did not change a thing. If you are thinking, “It has always worked this way,” or “Nothing changed on my end, why is it broken?” — that frustration is completely valid.

The honest answer is that the internet changed its authentication rules, not you and not KartHost. Email security standards that Google, Yahoo, and Microsoft now enforce across the board have made domain name email forwarding increasingly unreliable. This is happening to customers everywhere, regardless of who hosts their domain or where their email forwards to.

We are not sharing this to push you toward a paid service. We are sharing it because you deserve to know what is actually happening and why, so you can make the right decision for your business before you lose email entirely. A real hosted mailbox is not an upsell. It is simply the way professional email works in 2026, and it gives you a reliable foundation that will not break when the industry changes its rules again.

KartHost is here to help you make that transition as smoothly as possible — at your pace, with support every step of the way.

Open a support ticket in the KartHost Customer Center and we will handle the transition for you.

Compare KloudEmail Plans | Compare Microsoft 365 Plans

April 3, 2026 — prepared and authored by Gail Randolph, with Perplexity.ai assisting in validating and organizing the research for this article.