What are the key differences between synchronous and asynchronous email sending using SMTP and when to use each approach

Oct 27, 2019 ... No server is required — just connect EmailJS to one of the supported email services, create an email template, and use our Javascript library to ... Dec 5, 2018 ... The SMTP Received header is prepended by each SMTP server and describes the Envelope information about itself and the previous server. Jan 26, 2024 ... ... the information about Email Header metadata remains the ... the recipient's email server and records the initial sender during the SMTP session. Oct 1, 2022 ... In order to assist you further, we'll need some more information. Firstly, what is your operating environment, and what mail server software ... Mar 6, 2025 ... Navigate to Settings > Admin Settings > Advanced Preferences > Email Settings > SMTP Server. Click Configure SMTP Settings. The Custom SMTP ... Examine the response for ESMTP option and store them for use by has_extn() . Also sets several informational attributes: the message returned by the server is ... If so, can you test on the other mail server? If it works, can you find out the difference between the two servers? Any additional information you can provide ... ... SMTP server on the local machine to handle mail delivery. However, it is ... server options — Specifies necessary information about the server being polled, such ... Block Email during SMTP Dialog In a first step, the callout server will check the sender and recipient information that was transmitted in the SMTP dialog ... 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 ...