How do I find a postmaster contact at Terra.com.br and handle throttling issues?

Email marketer from Litmus recommends monitoring your sending reputation and avoiding sudden spikes in email volume. They also suggest segmenting your email list and sending to the most engaged users first.

Marketer from Email Geeks explains that while they don't have contacts there anymore the links provided by Brian should work. They also mention it's been a while they don't have issues there but it should work... it is throttling, and for them they had to put a mta configuration to send slower than big MBPs...

Email marketer from Email on Acid advises monitoring your sending reputation and lists various tools that can be used to monitor your reputation to see if you are being throttled. They also recommend reviewing your SPF/DKIM records.

Email marketer from Stack Overflow advises implementing a queueing system and gradually increasing the sending rate to avoid being throttled. They also recommend monitoring bounce messages to identify any issues.

Email marketer from Reddit recommends using a dedicated IP address and warming it up gradually to establish a positive sending reputation and avoid throttling. They also suggest segmenting your email list and sending to the most engaged users first.

Email marketer from Mailjet's documentation advises adhering to recommended sending limits and spreading out email sends over time to avoid triggering throttling mechanisms. They also recommend using their API to manage sending rates.

Email marketer from Terra.com.br Postmaster Page provides contact forms and information for postmaster-related inquiries at: <https://mail.terra.com.br/postmaster/index-en.html> and <https://mail.terra.com.br/postmaster/reclame_postmaster_ps_mail_form-en.html>.

Marketer from Email Geeks shares that Terra.com.br seems to have a few forms that might help: <https://mail.terra.com.br/postmaster/index-en.html> <https://mail.terra.com.br/postmaster/reclame_postmaster_ps_mail_form-en.html>

Email marketer from SparkPost suggests monitoring your sending reputation and adjusting sending rates based on feedback loops. They also advise against sending large volumes of email to new or unengaged recipients.

Expert from Spam Resource explains that finding direct postmaster contacts is becoming increasingly difficult. The best approach is often to use the contact forms provided on the ISP's website or to check their published policies.

Expert from Word to the Wise advises focusing on list hygiene and engagement to mitigate throttling issues. She suggests cleaning inactive subscribers and segmenting lists. Also working on permission passes to prove users want emails from you.

Documentation from RFC 5321 explains that SMTP servers use error codes like 421 to indicate temporary throttling issues. This documentation explains these codes can be used programmatically to handle and retry sending emails later.

Documentation from Microsoft Docs explains how Exchange Online implements throttling to protect the service. It details the various throttling policies and their limits, giving insight into how Microsoft manages email flow.

Documentation from AWS SES describes the sending limits and throttling policies applied to SES users. It explains how to request increases to sending limits and how to monitor your sending activity to avoid throttling.

Documentation from PowerMTA explains how to configure PowerMTA to throttle email sending based on various factors, such as domain, IP address, and time of day. It also details how to monitor PowerMTA's performance and adjust throttling settings as needed.