Reputation Management
Things to know about Blocklists
In short: a blocklist (formerly "blacklist") flags IPs and domains suspected of sending spam, and providers use it to filter or reject their mail. If you land on one, stop sending, find which list flagged you, fix the underlying cause (usually list ...
Bounces
In short: a bounce is an email the receiving server wouldn’t accept. Soft bounces are temporary and retried; hard bounces are permanent and should be removed and never re-mailed. Bounces are one of the clearest signals of list quality, so keep your ...
Multi-thread emails (Reply/Forward)
In short: don’t fake a reply or forward. Putting "Re:" or "Fwd:" on a campaign that was never part of a real conversation is a deceptive tactic that mailbox providers detect from the message headers, and it can violate anti-spam law. It erodes trust, ...
Sender Recognition
In short: people open email from senders they recognize. Build that recognition with a consistent from-name and business domain, authenticated mail (SPF, DKIM, DMARC — now required), a steady template and logo, and honest subject lines. With DMARC at ...
Role/group address
In short: role or group addresses like admin@ or info@ belong to a function or a team, not to one person who opted in — so mailing them drives bounces, spam complaints, and spam-trap hits that damage your reputation. Zoho Campaigns doesn’t allow ...
Unsubscribes
In short: an easy unsubscribe protects you. A visible unsubscribe link plus a one-click option (now required for bulk senders) keeps unhappy recipients from hitting "report spam" instead. Zoho Campaigns adds the link automatically and moves anyone ...
Feedback Loop (FBL)
In short: a feedback loop is how a mailbox provider tells the sender when a recipient hits "report spam." Zoho Campaigns receives these complaints and removes the complainers from your list automatically. Watch the complaint rate in every campaign ...
How to use Google Postmaster Tool to boost your Email Deliverability
Mailbox providers consider the reputation of your sender domain when making inbox decisions. If your sender domain has a negative reputation, your emails may land in the spam folder. If your sender domain has a positive reputation, the chances of ...
How to avoid complaints
In short: spam complaints are the fastest way to wreck your sender reputation, and mailbox providers now enforce a hard limit — keep your complaint rate below 0.3% (aim for under 0.1%). You avoid complaints by mailing only people who opted in, ...
Spam trap effects
In short: a spam trap is an address that should never receive marketing mail, so hitting one flags you as a spammer and can badly damage your sending reputation. You mostly avoid traps the same way you keep any list healthy — permission-based signup ...
How to avoid unsubscribes
In short: people unsubscribe when your email stops feeling relevant or shows up too often. Cut your unsubscribe rate by sending targeted, useful content to segmented lists, letting people choose their own frequency with a preference center, and ...
How to pass through Spam Filters
In short: spam filters decide whether your email reaches the inbox, and they judge you mostly on sender reputation, authentication, and how recipients engage — far more than on individual "spam words." Authenticate your domain with SPF, DKIM, and ...
What should I do if my emails get throttled
In short: throttling is a warning, not a wall. The fix is to slow down to the providers that are deferring you, keep sending only to engaged contacts, and let your reputation recover — while making sure your domain is authenticated and your list is ...
Improving double opt-in contacts
In short: A double opt-in list is one where every contact has actively confirmed they want your email — you collect the address (at events, via a website form, Tell-A-Friend, employee signatures, social lead forms, or gated content), then send a ...
How deleting and adding lists frequently affects your email deliverability
In short: repeatedly deleting mailing lists and recreating them breaks the engagement history that mailbox providers use to judge your sender reputation — and in Zoho Campaigns a deleted list cannot be restored. Keep a consistent list, use segments ...
Sending emails from multiple accounts
In short: running your email marketing from several separate accounts almost always backfires. It splits your sending history across accounts, so none of them builds the reputation mailbox providers now rely on — and you risk wasted time, lost ...
When will Zoho Campaigns suspend an account
Zoho Campaigns has a broad spectrum of users, ranging from new businesses to seasoned players. We are committed to offering a safe and secure email experience for all our users, so our anti-spam team validates all signup requests we receive. If we ...
When will Zoho Campaigns suspend a campaign
In short: Zoho Campaigns suspends a campaign when its anti-spam system spots signals of spam or poor sending practices — a blocklisted sender domain or IP, problematic links (blocklisted, shortened, broken, or direct-download URLs), spammy or ...
How a public domain sender address affects email deliverability
In short: A public domain sender address, such as one from Gmail, Yahoo, AOL, or Outlook, hurts deliverability because you can't authenticate a domain you don't own, mailbox providers distrust it, and recipients don't recognize your business. Zoho ...
Allow Listing of IP Addresses
If you're sending emails to your team members from within an organization, you may face issues because of the same domain being involved. This can be due to the email firewall taking necessary precautionary measures to combat any spoofing attacks, as ...
Bounce Reasons
Whenever an email campaign you send bounces, you'll receive an email in which you can find the bounce reason. More often, the reason would be straightforward. But if you feel lost, the below sections will be of help to you. Bounces can be categorized ...
List management and how it affects email deliverability
In this document, you'll learn everything about email list management and its importance in email deliverability. What is email list management Maintaining a clean and healthy email list is crucial for the success of any marketing business. Most ...
Shared and Dedicated IP Addresses
What is an IP address? An IP (Internet Protocol) address is a numerical label assigned to every device that connects to a network. In the context of email, the IP address is the origin point from which your outgoing messages are transmitted to ...