How to restrict who can use an SMTP relay server to prevent abuse

... SMTP server on the local machine to handle mail delivery. However, it is ... server options — Specifies necessary information about the server being polled, such ... Apr 23, 2024 ... When you start a mailing in Optimizely Campaign, it is transferred to the Optimizely Campaign sending SMTP server, a so-called Mail Transfer ... Oct 15, 2017 ... ... my own mail server. The mail server has STARTTLS enabled on port 587 (but not SSL); if I check "Enable SMTP over SSL/TLS" I get: Error ... May 17, 2018 ... ... the command line mail program on my server. Initially, I had ... Also, I can't see from the information you provided that we are ... 523 Size of your mail exceeds the server limits. 530 Authentication problem. 541 The recipient address rejected your message. 550 Non-existent email address. The consoles can send SMTP email messages to a specified list of email ... Click OK when you are satisfied with the information about the Mail Server window. Jun 3, 2015 ... It assumes that you have correctly configured your SMTP mail server, which is a middle-tier administration task. Note: For information about ... Apr 30, 2024 ... ... SMTP mail server configurations. Environment. Extreme Management ... NOTE: If "anonymous" authentication is to be used on the SMTP server, leave ... Feb 4, 2025 ... This should discover your account in Office 365 using IMAP. 4. If Thunderbird could not find your mailbox, enter the Manual Server Information ... Find more on why you should use domain and hash blocklists here. Technical information. You can utilize the data via the SMTP server configuration for ...