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Arnoldo said:
Had the same issue with my hosting company and Outlook for Windows AND Mail for Mac. As Dan said, Port 25 is often blocked due to spam. What happens is that certain ports block out certain emails.. I had ONE email that wouldn't send because it had the "PEN IS." Not like a schlong, but as in "The pen is..." (Ordering custom pens).

Changed the port to 115 (100-something) and everything works now!
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From my knowledge, you can send email on one port - or the other but not both. Port 115 is usually reserved for sftp traffic - not smtp. The host could have very well setup the server to communicate using port 115 but then it would not accept mail on port 25 (which doesn't explain why he could send 5 previous messages). Could it be that some spam device thought he was spamming (from inside the network)? Possibly.

Maybe you mean port 143 (IMAP)? Even if this was the case, it doesn't explain how he 'could' send other emails.

Abbey, I agree with all the others, get back in touch with your ISP and go through all the specifics of the configuration.
 
You're right.. 143.. not 115. Still, I just speak from the same experience. I had issues with port 25; while it wasn't blocked completely, it was intermittent.

Also, MAIL will not send out invalid emails. Make sure the addys are typed right.
 
Gentlemen, I don't know why, but it's been sending okay for the last few hours. All I did was have supper. I did nothing on the computer.

Even booked a wedding for next year by email.

Thanks for your help. Until next time. LOL
 
Considering the updated info (and in agreeance with Danno), I'm going with this being an ISP issue - 99.9% sure.
 
Arnoldo said:
MAIL will not send out invalid emails. Make sure the addys are typed right.
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I'd like to clarify something here for all of you that are not email / network / internet savvy. Your email client WILL attempt to send out ALL emails, to include invalid addresses. After your machine connects and transfers your email to the email server, the server will then try to send out this email. If the email cannot be sent, it will then be returned to you for either an invalid address (user or host) or other issue. The email client is stupid. It doesn't know who I am, who Jon Tuck is, nor Danno or Softjock Rick. The email client provides your messages to the email server - which understands domain names, [email protected], etc (and other things if you explicitly tell it to). The email server will attempt to send email to the domain. If errored, it will be returned. Hope it's clear as mud now.

:)

Analogy: You give a letter to the mailman. He accepts ALL mail because he does not know if this is a valid send to address. At the earliest time that the address can be validated, it will be and returned to the sender if need be.
 
Almost correct... Try typing in a fake gmail address while on the gmail client. Google will check to see of it's a valid user and notify you the moment you hit send. AOL has been doing this back in the days of 3.0.

Apple Mail works similarly with supporting clients, especially on Exchange.

Outlook looks for invalid email entries, such as Joe;[email protected]. Then again, all email clients do that nowadays.
 
Arnoldo said:
Almost correct... Try typing in a fake gmail address while on the gmail client. Google will check to see of it's a valid user and notify you the moment you hit send. AOL has been doing this back in the days of 3.0.

Apple Mail works similarly with supporting clients, especially on Exchange.

Outlook looks for invalid email entries, such as Joe;[email protected]. Then again, all email clients do that nowadays.
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Not quite. Gmail can validate Gmail addresses because guess what, they belong to Gmail - however, validation still happens at the email server and not at the client. If you don't believe me, try it. From Gmail, send an email to [email protected]. The email will send and you will get an error response. Outlook cannot (and for the foreseeable future will not) handle email address resolution. This is an email server job - not an email client.

Furthermore, the example you cited was an invalid email address based on syntax (character entry). Your email client may be able to prevent that.

What it will not prevent is email being sent to [email protected], [email protected], [email protected] and [email protected]. These are all valid email syntax's but may be invalid addresses / entries. Your email client could care less.
 
I think you have another issue - This is not a result of Gmail resolving the address prior to sending the message. If you copy and paste the address to a text app, do you get any funny characters? This is a legit syntax and Gmail should be accepting it.

Did you type in the email address - or click a link to have it autopopulate. Is this an original message or a reply?
 
Arnoldo said:
It's an invalid email (address)... I talked to the client and she gave me the correct one. Gmail will search to make sure a user exists in its database before the email is sent. Contrary to what you may believe, the fact is that this does not happen. This is much better than receiving a mailer-daemon reply. ;)
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Arnoldo - It may have been an invalid email, but your browser doesn't care. The error is actually pointing out something wrong (character wise) within one of the fields. Your browser is not capable of validating an address and to think otherwise is foolish. Your browser is simply that - a browser. It has no intelligence. There is no technology currently available to complete this function as of yet. You are experiencing a separate problem. I shall demonstrate this:

To: (Email Address Removed)
Subject: Test
Message: Test
Message sent @ 1:32pm

It is now 1:34 and after some more detective work, (Email Address Removed) is a perfectly valid email account / address. I think we have verified that this is a problem on your end sir. You should be able to send email to that address without error.

It is now 2:22pm, no error, no bounce back. By this time (alot of allowance), the recipient has been resolved and the user (Masked Per Posters Request) has received the message.

Arnoldo - it looks like you're using a Mac. Can you give me specifics of what you're doing when this happens? What browser? Is it Safari or other? I have a mac and will try to replicate your error.
 
Update: No errors, no bounce back

Arnoldo - Can you give me specifics of what you're doing when this happens? What browser? Is it Safari or other?
 
Arnoldo said:
Wait-- you emailed my client?? EXCUSE ME?????
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Did you not say it was an invalid email address? In any case, it was a message that said test - and that was all. I provided you the full content of the email test message. Keep in mind, I was trying to help YOU diagnose a problem you were / are having. I have no desire to email your clients. For all intended purposes, you showed a screenshot with this address and then stated the following:

Arnoldo said:
It's an invalid email... I talked to the client and she gave me the correct one. Gmail will search to make sure a user exists in its database before the email is sent. This is much better than receiving a mailer-daemon reply. ;)
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That means the address listed on the screenshot is according to you, 'invalid'. In helping you diagnose your problem, I sent a test to that address and it went through. Now, you say the address is your clients. Please make up your mind on what the facts are. In either scenario, you are having a problem locally on your machine. I have asked for specifics and haven't gotten any info. Again, I'm trying to help you resolve your problem. I'm one of the good guys on here. I'm not here to steal your clients.

Also, if you're going to be accusatory, then you can solve your own problems but do me a favor and don't provide information about areas that you don't know about - the beginning of this thread, you advised that the OP was having a port problem - which simply is not the case. I would also advise you to take some time to learn how products actually work before advising others about how they work.
 
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