When you send a campaign through Mailcamp, you may not receive out-of-office replies from every subscriber. This is normal for bulk email and does not mean the campaign failed.

Many inbox providers and company mail servers suppress automatic replies for marketing or bulk messages. They do this to prevent inbox loops, reduce unnecessary auto-responses, and protect recipients from automated email chains.

Why out-of-office replies may not arrive

• Some mail servers do not send automatic replies to messages they identify as bulk email.

• Corporate email systems may block vacation replies for campaigns, newsletters, and automated messages.

• Inbox providers may suppress auto-replies to prevent back-and-forth loops between automated systems.

• Some recipients may have out-of-office enabled only for people inside their organization.

• Some mail servers send only one automatic reply to the same sender within a certain time period.

What Mailcamp tracks instead

• Delivery: whether Mailcamp successfully handed off the email for delivery.

• Bounces: messages that could not be delivered to the recipient mailbox.

• Feedback or complaints: spam or abuse reports returned by supported mail providers.

• Opens and clicks: subscriber engagement recorded through Mailcamp tracking.

• Unsubscribes: contacts who opted out from future marketing emails.

Where replies are sent

• Mailcamp uses the sender details configured for your list or campaign.

• The From email is the address people reply to when they manually respond to your campaign.

• If you use a default Mailcamp sender address, replies may behave differently than when you use your own verified sending domain.

• For best results, use a monitored inbox as your sender address when you want subscribers to reply.

• Make sure the sender domain is verified when your plan supports custom sending domains.

Why this does not always mean a delivery issue

• An out-of-office reply is optional behavior controlled by the recipient's mail server.

• A campaign can be delivered even if no automatic reply is returned.

• Out-of-office replies are not a reliable way to measure delivery or engagement.

• Use campaign reports, bounce logs, unsubscribe logs, and engagement data to evaluate campaign performance.

How to improve reply handling

• Use a recognizable From name and sender email address.

• Send from a verified domain that matches your brand or organization.

• Use an inbox that your team checks regularly.

• Avoid using a no-reply style sender address if you want subscribers to respond.

• Tell subscribers in the email body if you want them to reply directly.

When to investigate further

• If normal manual replies are not arriving, check the sender inbox, spam folder, forwarding rules, and mailbox filters.

• If bounce data is missing or inaccurate, review your sending server, bounce handler, or delivery provider configuration.

• If subscribers say they replied but you cannot find the message, ask them to confirm the address they replied to.

• If the sender address uses an unverified domain, authenticate the domain in Sending domains before sending more campaigns.

Troubleshooting

• No out-of-office replies arrive: this is usually caused by the recipient's mail server suppressing automatic replies for bulk email.

• Manual replies do not arrive: check that the From email points to a real monitored inbox.

• Replies go to the wrong inbox: review the sender details for the list or campaign.

• Delivery looks low: check bounce reports instead of relying on out-of-office replies.

• The sender address is not accepted: use an address from an active verified sending domain or follow the default sender rules for your plan.