unable to connect gmail and hotmail via telnet
Solution 1
The reason telnet isn't working is because Google is now requiring ESMTP (EHLO verb, not HELO) and TLS. Telnet is now broken. You can use openssl, though.
openssl s_client -starttls smtp -crlf -connect smtp.gmail.com:25
The normal SMTP commands should work from there.
Solution 2
Why are you trying to connect to smtp.gmail.com? The MX for domains using google apps is aspmx.l.google.com and the MX for gmail.com is gmail-smtp-in.l.google.com. Are you trying to use Gmail as a mail relay for your computer, or trying to deliver to a Google Apps mail/gmail.com account?
aspmx.l.google.com does not require STARTTLS like smtp.gmail.com does, as it's an MX, not a mail submission point.
Also - what you pasted is invalid SMTP. You need angle brackets around the e-mail address in a MAIL FROM. Some SMTP servers might accept it, but Gmail won't.
$ telnet aspmx.l.google.com 25 Trying 74.125.53.27... Connected to aspmx.l.google.com. Escape character is '^]'. 220 mx.google.com ESMTP v8si11328246ybe.52 helo 250 mx.google.com at your service mail from: [email protected] 555 5.5.2 Syntax error. v8si11328246ybe.52 MAIL FROM: <[email protected]> 250 2.1.0 OK v8si11328246ybe.52
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Friedbert
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Updated on September 17, 2022Comments
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Friedbert almost 2 years
Hey all i am try to connect to gmail and hotmail server via telnet.
As:
$: telnet smtp.gmail.com 25 Trying 74.125.127.109... Connected to gmail-smtp-msa.l.google.com. Escape character is '^]'. 220 mx.google.com ESMTP j3sm3044317ybe.11 helo 250 mx.google.com at your service 220 2.0.0 Ready to start TLS mail from: [email protected] Connection closed by foreign host.
Here codeomnitrix is a user of smtp.localhost.com. And i am running postfix at my system with sitename being smtp.localhost.com.
And i am able to sent mail locally from one user to another user but can't send to any other user who is not local.
Thanks in advance:)
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Admin over 13 yearsIf I'm not mistaken, Gmail is exclusively SSL now, so 25 won't work.
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Khaled over 13 yearsAny relevant postfix log records?
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symcbean over 13 yearsThe sample you've posted here proves de facto that you are able to connect.
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Friedbert over 13 yearskk thanks sysadmin1138. but what do you think about hotmail as it says that you r not having static ip address. so how to tackle that one. Thanks :)
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Deb over 13 years@codeomnitrix That's a different issue entirely. For that you'll have to test from somewhere not on the Big List of Dynamic IP Addresses.
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Friedbert over 13 yearsHey akramer till mail from its ok but when i typed : rcpt to:<[email protected]> it gives some syntax error. here i am using my gmail account which is the destination of the email.