Summary
Emails to Tiscali.it bounce due to a combination of factors: Tiscali's slow or unresponsive mail servers and greylisting, strict spam filtering, DNS failures, temporary server unavailability, and sender-side issues. Solutions encompass retrying, adjusting timeouts, cleaning lists, warming IPs, proper authentication (SPF, DKIM, DMARC), contacting Tiscali, monitoring blocklists, examining bounce messages, and ensuring DNS is configured correctly.
Key findings
- Tiscali Server Issues: Slow or dead MX servers and greylisting impact deliverability.
- Strict Filtering: Tiscali's stringent spam filters require a good sender reputation.
- DNS Problems: Domain Name System resolution failures lead to bounces.
- Bounce Analysis: Analyzing bounce codes (4xx vs 5xx) reveals temporary vs permanent issues.
- Authentication Importance: SPF, DKIM, and DMARC are crucial for verifying sender identity and trustworthiness.
- List Hygiene: Maintaining a clean email list reduces bounce rates.
Key considerations
- Retry Soft Bounces: Resend emails that result in soft bounces.
- Adjust Timeouts: Increase wait times and connection timeouts to accommodate Tiscali's servers.
- Clean Your List: Remove inactive and bouncing email addresses to boost sender reputation.
- Warm-Up IPs: Increase the sending volume gradually to establish a positive sender reputation.
- Implement Authentication: Ensure proper SPF, DKIM, and DMARC setup to authenticate emails.
- Contact Tiscali: Contact Tiscali's postmaster for whitelisting or more information.
- Monitor Blocklists: Check for and remove your IPs from blocklists.
- Check DNS Configuration: Ensure DNS servers are correctly configured and can resolve external domains.
- Validate Email Addresses: Validate email addresses to minimize hard bounces.
What email marketers say
13 marketer opinions
Emails to Tiscali.it may bounce due to a combination of factors, including issues with Tiscali's mail servers (slow or dead MX records), greylisting, strict spam filtering, DNS failures, and temporary server unavailability. Solutions involve retrying, adjusting timeout settings, cleaning your email list, warming up IPs, implementing proper email authentication (SPF, DKIM, DMARC), contacting Tiscali's postmaster, and monitoring blocklists.
Key opinions
- MX Record Issues: Tiscali's MX records may be slow to respond or even non-responsive, causing connection timeouts.
- Greylisting: Tiscali employs greylisting, which causes temporary bounces; legitimate servers should retry delivery.
- Strict Spam Filtering: Tiscali has strict spam filters, requiring a strong sender reputation and proper authentication.
- DNS Failures: Temporary bounces can result from DNS resolution problems on the recipient's server.
- Bounce Types: Understanding the difference between soft and hard bounces is important for list management.
Key considerations
- Retry Sending: For temporary failures (soft bounces), retry sending the email.
- Adjust Timeout Settings: Increase wait times and adjust connection timeouts to accommodate Tiscali's slower servers.
- Clean Email List: Remove inactive or bouncing email addresses to improve sender reputation.
- Warm Up IPs: Gradually increase sending volume to Tiscali to establish a positive sending reputation.
- Implement Authentication: Ensure proper email authentication (SPF, DKIM, DMARC) to verify sender legitimacy.
- Contact Tiscali Postmaster: Reach out to Tiscali's postmaster for assistance and potential whitelisting.
- Monitor Blocklists: Check if your sending IPs are on any blocklists and take steps to remove them.
- SMTP Error codes: Review error codes to help identify the issue.
Marketer view
Email marketer from GlockApps shares that a good bounce rate should be below 2%. High bounce rates indicate problems with your email list or sending practices. Regular list cleaning and email validation are recommended.
5 Aug 2024 - GlockApps
Marketer view
Email marketer from SparkPost responds by describing that understanding the type of email bounce is important. They recommend parsing the SMTP response code to determine the cause of the bounce. Review the error codes to help identify the issue.
11 Dec 2024 - SparkPost
What the experts say
2 expert opinions
When emails bounce, especially to Tiscali.it, it's essential to analyze the bounce messages. A 4xx error typically signifies a temporary issue requiring a retry, while a 5xx error indicates a permanent failure, possibly an incorrect email address. Additionally, it's crucial to verify if your sending IP or domain is blocklisted, as this can lead to email rejections; if blocklisted, initiate the removal process.
Key opinions
- Bounce Message Analysis: Analyzing bounce messages (4xx vs. 5xx errors) is crucial for identifying the nature of the delivery problem.
- Blocklist Status: Being on a blocklist can cause email rejections by the recipient's server.
Key considerations
- Retry on Temporary Failures: If the bounce message indicates a temporary failure (4xx error), retry sending the email.
- Verify Email Address: If the bounce message indicates a permanent failure (5xx error), verify the recipient's email address for accuracy.
- Check Blocklist Status: Regularly check if your sending IP/domain is on any blocklists.
- Initiate Blocklist Removal: If blocklisted, promptly initiate the removal process according to the blocklist's procedures.
Expert view
Expert from Word to the Wise responds by suggesting you check to see if you are on any blocklists. Many ISPs and corporations use blocklists to filter unwanted email. If you are on a blocklist, your emails could be rejected by the recipient's server. You will need to request removal from the blocklist.
16 Apr 2024 - Word to the Wise
Expert view
Expert from Spam Resource explains that a bounce message should be examined to help determine the issues. A 4xx message usually means it is a temporary failure and you should retry later. A 5xx message indicates a permanent failure that might indicate the email address is incorrect.
20 Jan 2024 - Spam Resource
What the documentation says
5 technical articles
Emails bounce when sending to Tiscali.it for several technical reasons, including DNS lookup failures, temporary server issues, and lack of proper email authentication. Solutions involve ensuring correct DNS configuration, retrying delivery for temporary errors, and implementing DMARC and DKIM for enhanced security and sender verification.
Key findings
- DNS Lookup Failures: Mail servers may fail to resolve the recipient domain, leading to bounce messages.
- Temporary Server Issues: Temporary local problems on the recipient's server can cause transient delivery failures.
- Temporary Failures: 4.X.X status codes indicate temporary issues that warrant retrying the email.
- Email Spoofing Protection: DMARC protects against unauthorized use and email spoofing.
- DKIM Implementation: DKIM digitally signs outbound emails, verifying authorization to receiving mail servers.
Key considerations
- Verify DNS Configuration: Ensure DNS servers are correctly configured and can resolve external domains.
- Retry Delivery: Retry sending emails that resulted in temporary errors (4.X.X codes).
- Implement DMARC: Implement DMARC to protect against email spoofing by adding a DMARC record to the DNS zone.
- Set Up DKIM: Set up DKIM signing for outbound emails using access to DNS records, this improves deliverability by helping mail servers verify that authorized mail servers are sending the emails.
Technical article
Documentation from Microsoft Support explains that the error “451 Temporary local problem - please try later” indicates a temporary issue with the recipient's server. Retrying the email delivery is recommended.
14 Jul 2023 - Microsoft
Technical article
Documentation from Postfix.org explains that a 450 4.1.2 <recipient_address>: Recipient address rejected: Domain lookup failed, is caused by the mail server's inability to resolve the recipient domain. Ensure DNS servers are properly configured and can resolve external domains.
27 May 2022 - Postfix.org
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