Issues You Might Be Having With Your Website Email and How to Fix It

Your contact form submissions vanish. The emails of password reset are in limbo as the users check their inboxes. Email with websites does not work predictably, and the reasons are nearly always the same few issues recurring in millions of systems.

It is easy to fix them when you know where to look.

Authentication Records Are Missing or Broken

Email companies do not accept emails when they cannot verify the sender. In February 2024, Google and Yahoo made their requirements stricter on any person sending greater than 5,000 emails each day. The standards now mandate that SPF, DKIM, and DMARC records are configured appropriately. Since it has been increasingly enforced, Gmail has temporarily or permanently rejected emails that do not comply as of November 2025.

A DMARC Checker analysis of the 1 million most popular domains revealed that 39% of them lacked an SPF record. Numerous invalid configurations existed, among others. It is likely to make errors when setting these records, and errors result in bounces.

SPF instructs receiving servers on which mail servers are permitted to send on your behalf. DKIM appends a cryptographic signature to confirm that the message was not tampered with during transit. DMARC directs servers on how to handle failures in SPF or DKIM verification. You need all three.

According to SiteGround documentation, SPF is provided by default based on the domain using their DNS zone, and DKIM should also be on. According to GoDaddy, DMARC is to be implemented when SPF and DKIM are already present. DNS modifications normally propagate in an hour or may take up to 48 hours to be propagated globally.

Server Configuration and the PHP Mail Function

By default, WordPress websites use the PHP wp_mail() functionality. This feature is wholly reliant on server configurations, and most hosting applications fail to set up this functionality correctly as outbound mail. The result is a silent failure. The contact form or notification email is never received, and the contact form sends no error message. The addition of shared servers makes this issue more complex since the IP addresses usually have a bad sender reputation with other users on the machine.

Switching to a dedicated SMTP plugin solves most of these cases. The plugin routes mail through an authenticated external service like SendGrid or Mailgun, bypassing server limitations. Your WordPress hosting provider may also offer built-in SMTP tools or allow custom mail server configurations through the control panel.

Wrong SMTP Settings Block Outbound Mail

Bluehost support documentation has singled out the wrong SMTP settings as the main cause of sending failure. Your full email address, including the domain, is needed in the username field. Incomplete addresses are not going to be authenticated.

Port selection matters. Port 465 should be used with encryption through SSL, or port 587 without encryption. Confusion of the wrong port with the wrong encryption type will lead to failure of connections. User authentication in SMTP has to be turned on.

A 550 verification failed error gives an indication of two issues. Either an account has gone over its storage limit, or there has been a misconfiguration of the SMTP server authentication of your email client. Check both.

MX Records Pointing to the Wrong Place

Mail Exchange records inform other servers of where to send your incoming email. Mistakes in this area prevent the delivery of mail altogether.

ProtocolGuard lists the common failures. A missing MX record means no server knows where to send your mail. Incorrect priority values cause messages to route in the wrong order or fail completely. Pointing to a non-existent server bounces everything. The MX target must be a fully qualified hostname with valid A or AAAA records. It cannot be a CNAME.

Before changing MX records on a live domain, test in a staging environment. Document every update. Keep previous configurations saved for quick rollback. After saving changes, wait 24 to 48 hours for propagation, then verify using DNS lookup tools.

Your Messages Land in Spam Folders

According to Proofpoint, blocking can be triggered when a spam complaint has more than 0.3. This should aim at 0.1 percent or lower, i.e. no higher than 1 in 1,000 messages sent out as spam.

The filtering criteria are identified by Mailgun. Mailing companies scrutinize sender reputation, authentication, content quality, and engagement rates. Lack of SPF, DKIM, or DMARC records will put you directly in spam. So will be low open rates, high bounce rates and suspicious formatting.

Content composition affects delivery. Emails heavy on images with minimal text resemble spam tactics. Aim for 60% text and 40% images. Include alt text. Host images on reputable domains.

Unclean email lists with invalid addresses generate bounces. Bounces damage your sender’s reputation. Clean your lists regularly.

Mailbox Storage Limits Reached

According to the InMotion Hosting support, each mailbox will have a storage limit that includes emails, attachments, folders and calendar items. Making the cap prevents the receiving and sending of messages.

The solution involves releasing space or a storage upgrade. Begin with Sent, Trash, and Spam. These put in data that is forgotten by the users. Delete what you do not need. Trash disappearance, wipe up trash after deletion, or the trash will keep using the quota.
Connection Failures in Microsoft 365.

Microsoft 365 Connection Failures

n Microsoft documents, the most common cause of send and receive failures is mentioned as old software and broken Outlook profiles. In order to fix a profile, go to Account Settings under the Email section, under your account, and then repair. Fill in the wizard and relaunch Outlook.

According to GoDaddy, Microsoft 365 accounts no longer use POP and IMAP functions. Individuals who have been set to use these protocols will go offline. Change your email client to Exchange. Using POP and IMAP, your information is stored within your account only on the computer. Exchange harmonizes information between platforms.

How to Check Your Sender Reputation

Monitoring is available on free tools. Talos Intelligence and SenderScore display your reputation history and indicate red flags when it comes to deliverability. Issues are identified on a monthly basis before they unravel.

A poor reputation accumulates from bounces, spam complaints, and sending from blacklisted IP addresses. Shared hosting exposes one to this risk. The IP reputation that you, too, rely on can be harmed by other users on your server.

The Steps That Actually Matter

Configure SPF, DKIM, and DMARC records correctly. Use SMTP authentication with the right port and encryption settings. Verify MX records point to valid mail servers. Keep mailboxes under quota limits. Monitor sender reputation monthly. On WordPress, use an SMTP plugin instead of the default PHP mail function.

Most email failures trace back to one of these areas. The diagnostic process involves checking each in sequence until the problem surfaces. Start with authentication records, then move to server settings, then examine content and reputation factors.