In this manual of TripleZero iT we discuss Add attachment in webmail. Email problems are almost always in DNS, client authentication, or a full mailbox — rarely in 'the server is down' without a log line.
We write based on the working method in our customer panel and the control panels that belong to your package (DirectAdmin, CyberPanel or Plesk). Follow the steps in order and test after each change.
Preparation
- Login for the TripleZero iT customer panel.
- Access to DirectAdmin, CyberPanel, Plesk, or the VPS console — depending on your product.
- A current backup or snapshot if you change something structurally.
- The exact hostname or IP you will be testing on.
Steps
- Test in webmail: receiving and sending.
- Compare the client settings with the data in this knowledge base (IMAP/SMTP, ports, SSL).
- Check disk quota, spam folder and whether password has been changed recently.
- Look at SPF/DKIM if third parties reject your email or mark it as spam.
- Then apply the specific solution from this article.
Mail clients and delivery
Default settings at TripleZero iT: IMAP 993, SMTP 587 with STARTTLS or 465 with SSL, username is the full email address. Webmail is the reference: if it works, then the problem lies in the client.
You combat spoofing with SPF, DKIM and DMARC — not just with a spam filter. Bulk mail goes through a specialized shipping service, not through the mailbox of your website.
Check whether it was successful
- Does the service work from another network or 4G (no old DNS cache)?
- Do you not see any new 4xx/5xx or auth errors in logs?
- Is the time correct: DNS-TTL, Microsoft-verification or SSL-issuance may take minutes.
If things still go wrong
Reset the previous value if the change is clearly the culprit. Write down error texts literally (no paraphrase). Send in a ticket to TripleZero iT: product, domain/IP, timestamp and screenshot.
Can't figure it out after these steps? Open a ticket at TripleZero iT via the customer panel. Mention your domain name or VPS hostname, the time and what you have already tried.
Related: webmail, SPF/DKIM/DMARC and spam filter.