![]() It also checks the sending domain for any potential DNS issues, such as invalid DomainKeys Identified Mail (DKIM) and Sender Policy Framework (SPF) signatures. Your recipient’s mail server checks the sending address, recipient address (to ensure it’s a valid recipient), and message content.Our server takes the message information we gathered from your request, then repeats the conversation process in step 2 with the recipient’s mail server.Your mail client has a conversation with our server, first verifying that the username and password used for authentication correspond to an active account, then relaying the message information, such as sender address, recipient, and message content.Your mail client connects to the SendGrid SMTP server,, using port 25 (by default).How the Twilio SendGrid SMTP server works What does the SMTP server do when I send an email with Twilio SendGrid? Want more information on SMTP? Check out our SMTP Service Crash Course. If the email is undeliverable, the SMTP ensures the email will bounce back to the sender, letting them know they have an incorrect email address or the receiving email server blocked the email for whatever reason. In other words, the email server checks whether an active or working email account sent the outgoing message, protecting your inbox from illegitimate email. Without the SMTP server to process the message, the message wouldn’t translate.Īdditionally, the SMTP server verifies that the outgoing email is from an active account. Once you hit Send, the email transforms into a string of code sent to the SMTP server, which processes that code to pass the message. However, w ithout an SMTP server, your email can’t make it to its destination. When communicating over email, it’s crucial to send email to your recipient safely and on time. An SMTP server also isn’t necessarily on a machine but can be an application constantly running in anticipation of sending new mail. Like most servers, the SMTP server processes data sent to another server, but it has the specific purpose of processing data related to the sending and relaying of email. Is an SMTP server the same as a normal server? Common SMTP server providers and settings SMTP Provider ![]() You can find more details to help you understand the SMTP meaning on our docs page. The recipient’s inbox service provider, such as Gmail or AOL, then downloads the message and places it in the recipient’s inbox. So w hen you send an email with SMTP host Gmail or AOL, the SMTP server processes your email, decides which server to send the message to and relays the message to that email server. Using a store and forward process, SMTP works with the mail transfer agent to move your email across networks to the right computer and email inbox. You can generally find your SMTP email server address in the account or settings section of your mail client. For example, the SMTP server Gmail uses is, and Twilio SendGrid’s is. Without servers, you would only be able to send emails to people whose addresses matched your domain- to, for instance.īecause an SMTP email server pertains to outgoing email, it’ll have an address (or addresses) that the mail client or application you use can set that generally looks like this:. Much like a mail carrier, every email message passes through the mail server before reaching its destination. What is an email server-and what is an SMTP server?Ī mail server is a generalized term to describe a system that collects, processes, and serves email. Without it, email communication would be nonexistent since SMTP determines which servers will receive your relay messages. The Simple Mail Transfer Protocol (SMTP) is an application used by mail servers to send, receive, and relay outgoing email between senders and receivers.Īs the technology behind email communication, SMTP is the protocol that allows you to send and receive emails. What does SMTP stand for?Ĭurious about the SMTP meaning? We’re glad you asked. To help you navigate your email sending-using an SMTP server to send email-we’ve put together a list of the most common SMTP server questions we receive, so you’ll be an SMTP expert in no time. ![]() If you’re just dipping your toe into the how-email-gets-sent world, it’s easy to feel overwhelmed. However, with emails, the SMTP server acts like the post carrier-though that’s just the beginning. ![]() The process of sending an email is similar to mailing a physical letter: through a series of steps, an organized system takes care of the envelope and drops it off to the recipient. Emails play a big role in how we communicate, but what happens when we send an email? ![]()
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