Cannot send message using server smtp.seas.upenn.edu

I can use the mail to recieve and send all mail when I am on campus, but as soon as I am off campus I can only recieve the mail. Every time i try to send I get this error. I have tried all kinds of ports, the ones Mail recommends and the ones on UPenn website. I have also tried password authentication.
But i'll either get the smtp server is offline or just the error message over and over again, nothing works! help!!!

Well, you could, but the reason that I personally don't exceed 49151 is that, for example, when you type a URL in Safari web browser and hit return, the application on your computer chooses a random port number from which to send the packets out of, destined for delivery to port 80 of http:apple.com. It's not leaving your computer on your computer's port 80.
Same when you check your email. That port 110 or 143 or 993 or 995 or 25 or 465 or 587 that you set up in Mail's Preferences? That's on the server, has nothing to do with what port number the traffic leaves your machine (which is the same as what the server's port 110, etc., sent its packets back to.
Easily verifiable by watching Wireshark or tcpdump on your machine; all traffic leaving your machine (assuming that YOU are not running a SERVER application) leaves on port 49152 or higher. That's why, on the port list to which I linked in my previous post, at the bottom of the list, it says "The Dynamic and/or Private Ports are those from 49152 through 65535".
So let's say you are tunneling smtp traffic through secure shell to get to the O.P.'s school's smtp server. You can't specify smtp.seas.upenn.edu port 25 in Mail Prefs for the server. So you specify localhost as the smtp server and a server port such as 25025 (in an "unassigned" range of 25010-25792 that is less than 49152) that you will tunnel through ssh to get to the school's smtp server.
So, just like I choose port numbers for port tunneling that fall within the range of the many "Unassigned" blocks, which are all less than 49152 by the way, I make that 49151 upper limit a personal criteria, too, because with my luck, I'd find a way to be running some server application or be running any application that initiated some internet traffic that would randomly choose the same port that I was trying to tunnel traffic via ssh. So it's just to ensure that there are no port conflicts, no matter how small the probability would be that there might be a conflict with the dynamic ports. You've heard the old adage "If I didn't have bad luck I wouldn't have any luck at all," right? That's me.

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Keep getting 'Cannot send message using server...' message - Why!??

Hi there,
Every time I launch Mail, the first time I try to send a message I get the same window, warning me that Mail 'Cannot send message using the server...'.
It's annoying, because this is the only server I have, and it does work. I just have to hit the 'Use Selected Server' button, and it works.
But next time I launch Mail, I have to go through the same tired routine.
Does anyone have any suggestions as to what I might do to solve this problem?
thanks so much,
Malcolm

Hi Malcolm.
It isn’t clear whether you’ve always had this problem in Mail, or it started to happen as a result of some changes you made, or what...
Is this outgoing server associated with a mail account provided by your ISP or something else?
Doesn’t the error message give any additional information as to what could be the cause of the problem? What does Window > Connection Doctor say?
Go to Apple Menu > System Preferences > Network, choose Network Port Configurations from the Show popup menu, and make sure that the configuration used to connect to Internet appears at the top of the list. Try also turning OFF all the network port configurations except the one needed to connect to Internet and see whether that helps — if it doesn’t, turn ON again the ones you want enabled.
Also, try using a different method to connect to Internet, if possible, or connecting the computer to Internet as directly as possible, i.e. bypassing any routers that might be present, using an ethernet cable instead of wireless, etc.
Mail keeps information about outgoing (SMTP) servers in a separate list independently of the mail accounts themselves. The account settings just associate one of the available outgoing servers with each account. Orphaned or dangling outgoing server entries (i.e. not associated with any account) sometimes cause weird sending problems.
Go to Preferences > Accounts > Account Information > Outgoing Mail Server (SMTP), choose Edit Server List from the popup menu, and delete any servers that shouldn’t be there. The Edit Server List panel shows the account each outgoing server is associated with.

Cannot send message using server icloud, cannot send message using server icloud

Whenever I try to send a message from my iCloud mail id using Lions mail client I get the following
The server “p08-smtp.mail.me.com” cannot be contacted on the default ports.
Select a different outgoing mail server from the list below or click Try Later to leave the message in your Outbox until it can be sent.
I saw an articale suggesting trying to change the SMTP server to SMTP.MAIL.ME.COM but when I try that I get address rejected
Sending mail through the web interface seems to work OK
Any ideas?

I did some looking around and think I've got the right answer. if I use networktool to do a lookup of p08-smtp.mail.me.com it returns address not found.
It looks like p01-smtp to p04-smtp are defined but the others aren't.
I created a new smtp server and called it icloud2 and used the address p04-smtp.mail.me.com with the usual settings of USE SSL and AUthentication = Password (and gave it my iCLoud login details).
Associating that SMTP server with my iCloud account in mail.app lets me send perfectly.
I assume this is just apple not having everything not set up and replicated to DNS servers yet so I'm checking to see if p08 exists every couple of days and I'm move my iCLoud account to the normal SMTP server when I start getting nslookup responses.

"Cannot send message using the server....."

Hi all,
Considering the nature of the problem I am about to relate I would have to say at the outset that I would be very very surprised if other people have not come across this problem, so here goes...
We have around 60 users of Apple Mail from both 10.4 and 10.5, so varying degrees of versions of Apple Mail however most if not all are updated to 10.4.11 and 10.5.2.
We have been plagued with people being frustrated about emails bouncing back with an immediate error which is basically the following...
"Cannot send message using the server smtp.xxx.com:user
Sending the message content to the server failed.
Select a different outgoing mail server from the list below etc etc"
I am sure a lot of you have seen this error.
However, it is totally random but I am at the end of my tether with it. It generally revolves around emails with attachments and can be totally random. I was trying to send a screenshot today, very small screenshot, using the Apple-Shift-4 technique, sent the .png file, then saved it out as a .jpg, nothing. Tiny file, around 5k. Got the error above, took it out, sent no problem. Other similar files on the desktop refused to send but a .pdf did. I then thought it might be our server, so sent teh same attachments using my .mac account. Same result and failed to send. Reports from other users in our group show that they too get random results, maybe moving the attachment in the email makes it go, sometimes putting it before your signature, sometimes putting your signature copied and pasted in so many times makes it work, all sorts of methods but all resulting in the same conclusion, Apple Mail can be very unreliable.
We have even migrated some users to Entourage and the problem disappears. Even to Thunderbird, but those users miss the search capability as it is quicker and more reliable. So they want to go back.
Considering I have been struggling with this issue back in the day when we were on the Apple Mail related version in 10.4 I was hoping that the version released in 10.5 would remedy the problems. Sometimes I feel it has just got worse.
Is anyone else experiencing this sort of difficulty in Apple Mail, I really feel isolated and at a loss with how to remedy this for so many users.
If anyone can share their experiences and how they have got around similar issues in Mail I am all ears and open to any suggestions.
Thanks everyone for taking the time to read through this. There is more but the experiences are so random it is not worth trying to put it all down.
Thanks again.
Gerry McCoy

I went in to Connection Doctor and. oddly enough, for this Mac account it said I was on Port 25. Si I changed it to Port 587 and saved the changes.
Still, I have the same problem with the same error messages.
I go back to the mail preferences > Accounts > Advanced and it shows Port 143 still there grayed out.
What about SSL - it's not checked.
Odd that this problem only seems to be from one .mac account emailing to another .mac account. Could the server be down?

Cannot send message using the server (null)

i use mail 2.1.
i have a .mac account and have three other email accounts attached to my mail account.
lately, i cannot send any email.
the switchiing ports fix hasn't helped either.
this is the error message:
CANNOT SEND MESSAGE USING THE SERVER (null)
The server response was: 5.1.0 <email [email protected]>...
From address does not match authentication.
Use the pop-up menu below to try a different outgoing mail server. All messages will use this server until you quit Mail or change your network settings.
Message from: email <[email protected]>
Send message using: [there is a combo box here with all the four accounts servers listed]
no matter which one i pick it doesn't work and no email is sent.
anyone have this error before? or now how to fix it?
i'd be appreciative.
thanks
1.67 GHz Power PC PowerBook G4 Mac OS X (10.4.6) Sony HDR HC3 HD HandyCam MiniDV

I was having a similar problem (don't feel like typing all the details)
I was about to to delete my com.apple.mail.plist, when finally it hit me.
I ran ethereal (again, I'm sorry, but learning how to use ethereal is a topic unto itself). Following the TCP stream (ie. looking at the smtp messages being sent back and forth) I came across two problems. For some reason my port number was set to 567 or something like that, when it's supposed to be 25, as I had originally set it to.
Once I corrected the port number I started receiving an error message from the smtp server. It said the return email address could not be authenticated. (using xyz.com as an example) The correct return email address was supposed to be [email protected], but for some reason it was changed to john@xyz in the account settings.
Anyway, to get to the point, another thing to check is that your return address has been set correctly, and if all else fails, make sure you have X11 installed and use fink to install and run ethereal. This will let you know if you are actually connecting to the server, and will show you any error messages.
PS. I think this problem started occurring with the last update made to mail. I believe it somehow corrupted my settings. This would explain how my port number could have been changed to the default port number of .mac mail.

HT1277 I can recieve emails but I can't send them out. The blue bar at the bottom left of the Mail page gets half way across and then the pop-up "Cannot send message using the server" comes up? What do I do?

I have my Yahoo Mail "poped" over to Apple Mail. I can recieve emails but I can't send them out. The blue bar at the bottom left of the Mail page gets half way across and then the pop-up "Cannot send message using the server" comes up? What do I do?

Your outgoing mail server is different than your incoming server. Usually the outgoing mail server will have smtp in it. I noticed yours said "cannot send message using the server mail.wavecable.com". That sounds like an incoming mail server. Try setting your outgoing mail server to smtp.wavecable.com
I hope that helps.

Apple Mail Time Out / "Cannot Send Message Using The Server..."

When trying to send messages of 5-10MB using my Apple Mail, it sends fine when on my home connection. But when on my (3G) mobile datacard, it seems to get half or 3/4s the way, but doesn't quite make it to the end, then times out with the message "Cannot Send Message Using The Server...". It seems that the Apple Mail doesn't allow enough time before deciding to cancel the attempted send. Is there a way to fix this eg by changing settings?

I'm seeing something similar here (using an Exchange 2007 server -- SMTP works just fine). Unfortunately, I have no solution to offer. I would be glad to hear of any, though.

OSX Mail - Cannot send message using the server ....

Hi there,
Mac Pro with OSX 10.6.
*Can receive mail, but can no longer send email* using the program Mail.
Been getting the popup "Cannot send message using the server [shawmail.vc.shawcable.net] for the past 3 days. I hadn't changed anything about my computer, and have had the Mac for 2+ years. So this just started doing it on it's own.
I had a technical support guy from my service provider even interface with my computer, where he could see my desktop right over the internet, and he couldn't get it fixed either.
I googled this problem, and found solutions like:
1. Uncheck "Use SSL" (Done that, and it was never checked "on" to begin with)
2. Make sure Authentication is set to none, with no password (done that, and it wasn't set with a password to begin with)
3. Delete [user]/Library/Preferences/com.apple.mail.plist (done that, didn't do anything)
4. We even totally deleted my account, and started a new fresh one. Didn't work
The tech support guy did show me a way to email online, using the same email account. That worked, but it's a hassle to go onto a web-based email program -- it's not my preference. So, with great certainty, it's not my service provider, because I was able to send emails on this web-based email program using my email account.
So there, I'm stumped.
Hopefully someone can help. What's bizarre is that googling this problem, I have found many other people that say it happens arbitrarily, out of nowhere.

I can't believe how ridiculous this issue is. i have been searching for days for a solution to this. i have tried EVERY recommendation on these forums and nothing works. It appears that this issue dates back to TIGER. I had this problem back in January and just bagged figuring it had something to do with iweb. I bought a new html program and was able to send out my newsletter last month no problem. Suddenly, one month later- here i am again, unable to send out my newsletter with no help from Apple or verizon, or these forims, or anyone else. To think that a company that I have stood behind and loved so much can't be be bothered fixing such a simple issue that has been going on now through 5 OS's (I am using Lion but I had the issue using leopard as well) is a disgrace.

I tried to send a mail message to too many addees. when the rejection came back "cannot send message using the server..." the window is too long to be able to see the choices at the bottom of it. how can i see the choices at the bottom of that window?

I tried to send a mail message to too many addees. when the rejection came back "cannot send message using the server..." the window is too long to be able to see the choices at the bottom of it. how can I see the choices at the bottom of that window?

I tried to send it through gmail and the acct is a POP acct
I'm not concerned about sending to the long address list. I just can't get the email and window that says "cannot send emai using the server..." to go away. The default must be "retry", because although I cannot see the choices at the bottom of the window if I hit return it trys again... and then of course comes back with the very long pop up window that I cannot see the bottom of so I can tell it to quit trying...

Cannot Send Messages Using the Server

I am dependent (during the day) on a wireless connection to the Minneapolis Wi-Fi system (U.S. Wireless).
I've got an e-mail account with comcast and I have successfully interfaced this with the Apple Mail application that came with OS X 10.5.4 and for many weeks have been happily sending and receiving e-mails. But....
I've been on the road and had to connect with Hotel internet services and I was picking up free WiFi in NYC when I was there.
I first noticed the problem when I was staying at a hotel in Vermont.
I would try to send e-mails and I would get the message:
CANNOT SEND MESSGE USING THE SERVER __________.
Select a different outgoing mail server....
Now, I am back home and using my U.S. Wireless connection (which has been really bad lately).
I keep getting these blasted messages and my mail sometimes goes through but more than often, I get these "cannot send message.." notices and my e-mail just sits there going nowhere in the outbox.
How can I solve this problem?

Beside the SMTP name -- smtp.comcast.net -- there is a pair of arrows, with one pointing up and one pointing down. If you click on those arrows you will be presented with a list of all SMTP ever enter (you may only have one), and also the command to Edit Server List. If you choose Edit Server List, you will be presented with a completely new setup window, dealing only with SMTP servers, and that window will have two tabs, one of which is also Advanced.
From the name, smtp.comcast.net, without your Username appended, would indicate that an Authentication of None is currently in effect. With changes that Comcast has made recently, whether you use Port 25 or Port 587, I believe you would have to use Password Authentication, most certainly if the latter Port 587 is chosen.
If you click on the link below, although not for Comcast, you will nevertheless see in section 12 through 15, screenshots that cover the SMTP setup that I am describing above.
http://wildblueworld.com/dishmail.net/howdoi-applemail.php#2
Ernie

TS3276 How can I escape a frame block with "Cannot send message using the server Gmail"?

The Mail send window blocked with the additional message The server "smtp.gmail.com" did not recognise the following recipients:" and appears constantly. It does not prevent me using Mail but I want to get it off my desktop.
Any ideas?

Are there any unsent messages in the Outbox?

Can't send message using the smtp.server

why does this continue?
I have a deadline and can't send the files.
thanks,
christa

I have been having the same problem. I have a dot mac account wich I use as my primary e-mail account. I receive just fine, I just cannot send using mail. If I loggon to the dot mac website, I can send mail that way. But I cannot send using mail. The strange part is, I can use mail on my iBook (G3), and my daughters eMac (G4). I have checked, they all hace the same options checked in the account settings. But, my pride and joy (iMac G4) refuses to send mail. It gets frustrating having to logon to the website just to send mail. HELP.

Error - cannot send message using the server....

Until today I thought the following error message was due to a limitation imposed by my IP (Roadrunner). While talking with their Tech support on an unrelated matter I mentioned this error appears whenever I send an e-mail containing multiple groups (smart groups) created in Address Book.
Roadrunner says the error is being triggered within Apple's Mail program and not at their server level. If that's true, then what is the recipient # ceiling within an e-mail (individual or group)? For further clarification, when the above error does appear (only occurs with 2 or more groups in the To: field, where recipients per list is over 50), the remedy is to remove all groups except one. Then the e-mail can be sent with no problem. If the multiple lists are below 50 or so, then the e-mail can be sent.
Appreciate any feedback.

Hi Ernie
It might relate to how Mail lines up the addresses, but any limit is from the SMTP.
RR Tech support said their system had a limit of 1,000 e-mails a day. Otherwise, all ought to go through. They suggested I call Apple (is that suggestion branded into their brains during their customer sensitivity training? )
Are all the addresses in the To header, or elsewhere?
All in the "To" field. As I posted, in Address Book the groups are created using Smart folders. On the receiver side, those that do go out reach the recipient with no problem.

HT1277 Help! Keep getting Cannot send message using the server lass1 - n1s.host-service.us tried all the other servers is it because it's my own company and i set up the email on cpanel ?

I've tried using all the suggested ones.
I need help configuring.
I think it's because it's my own website like company. not @hotmail.com or gmail.
Help !

Hi, is it POP or IMAP?
Might it be your chouce of ports?
The receiving email ports are:
IMAP is port 143
IMAP-SSL is port 993
POP is port 110
POP-SSL is port 995
Outgoing ports are...
SMTP and SMTP-SSL is on ports 25, 587 and 465. Port 587 has to be SSL, and port 465 is enforced TLS-wrapped and is generally used by Outlook users.

I cannot send message using iMessage. I have ipad2 and even my FaceTime I can't use

Please help.. I can't use it properly.. T_T

Clive11 wrote:
Please help.. I can't use it properly.. T_T
You're going to need to give a few more details. What is happening when you try to use them? What troubleshooting steps have you already taken? What, if any, error messages are you getting?

Cannot send message using server smtp.seas.upenn.edu

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