Default port Mail uses to send e-mail

My ISP sent an e-mail that they want me to change the port my e-mail program uses. They said most programs use port 25 and they wanted it changed to port 587 because it's safer. I called them to clarify and the tech had me change my Mail 3.6 preferences/advanced from port 995 to port 110 which he said was safer. Doing so renders me unable to e-mail so I switched it back to port 995. He couldn't figure out why 110 wouldn't work and suggested I contact Apple. I'm an idiot with this stuff and would appreciate any input on if I need to make any changes to my Mail account or not based either on the message from my ISP or the change the tech was trying to make. Unless I hear otherwise I'm staying at 995.

iMac w/ Leopard, Mac OS X (10.5.6), first time Mac user

Posted on Jul 15, 2009 1:01 PM

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10 replies

Jul 15, 2009 1:30 PM in response to Surf Cat

I certainly don't think you are an idiot, but not so sure about the tech?

Neither Port 995 or Port 110 has anything to do with sending. Port 995 is for a POP3 server when using SSL, and 110 is for when not using SSL. Using SSL is generally thought to be safer, but not all servers support it. Cox for example has been known to have some implementation issues with supporting SSL.

With regard to the port for the SMTP, open Mail Preferences/Accounts/Account Information and click on the arrows beside the name of the SMTP (Outgoing Server) and choose Edit Server List. Next choose the Advanced Tab available at that point, choose Use Custom Port, and setup 587. Using 587 will always require separate authentication, which it is possible you have not had to use with Port 25, but that would depend on your ISP. At any rate, use the Username and Password that you have used with the Incoming Port and all should be well.

Ernie

Message was edited by: Ernie Stamper

Jul 15, 2009 1:33 PM in response to Surf Cat

The main difference from port 25 is that port 587 requires authentication, as specified in the draft standard RFC 4409.

Port 25 is the default port for smtp traffic. Your ISP (along with many others)
is going to block traffic on port 25 in an effort to stop SPAM.

Steps:

Open Mail
Click on Mail Preferences
Select Accounts at the top
Click on the mail account you are using on the left
Click the drop-down menu under Outgoing Mail Server (SMTP) and select Edit Server List.
Select Advanced.
Type 587 in Server port
Authentication select Password
Put in your username and password
Click OK

Jul 15, 2009 6:04 PM in response to Surf Cat

Thank you both for the info. It makes a lot more sense now than it did when all I had was the e-mail my ISP sent - which I found quite confusing. I made the change that you both had given instructions for and Mail seems to be working just fine. Essentially it seems I limited Mail to using just port 587 instead of a few it could use before. I will even go so far as to contact the ISP again to tell them how this was resolved so others can benefit from what I've learned from you. Thank you kindly!

Jul 15, 2009 8:29 PM in response to Surf Cat

The Default Port list is meant, I believe, to allow Mail to negotiate a working server at various locations, if you were to be moving about with a laptop. At a single venue, such as home, there is no reason not to establish the port manually as we instructed. They did not tell you Port 25 would not be working (although likely it will soon not be), but "suggested", it appears, that you establish the port to be 587. Thus it is best to take the options away, and simply override the choice of port.

If Port 25 were made non-working, then Mail would likely negotiate to present the outgoing server on Port 587 of its own accord.

The Default Port did not appear in Mail until 10.5.5 and Mail 3.5, as best I remember (I could check, but little need to).

Still not sure what the tech was telling you about the Incoming Server.

Ernie

Jul 15, 2009 10:51 PM in response to Steve Berde

Now that most free email accounts allow POP access, I have all of my clients get one of them, and abandon their ISP accounts. It makes it much easier to change Internet providers and these companies do spend money on development and quality improvements. Most ISP email servers are poorly run, the techs are not well trained, and when you call for support they don't really have a clue if you ask them a question that's not on the script table they use. My own Telco finally contracted out the email server because they were on version 3 and couldn't keep it running. Now the Telco has even less of an idea or source of information as everything is 3rd party with another company with the "new" version 4 mess.

The ISP's also have a terrible record for effectively controlling incoming Spam. Their Spam filter systems are unsophisticated, very mechanical, and run way behind the trends. Gmail does much better, and even Hotmail now known as Livemail does a much better job of blocking crap. Yahoo doesn't support free access to POP mail so I don't even consider them when making recommendations. I don't consider using another program to trick Yahoo as support.

ISP's view email servers as an expense, and will not do anything more than a bare minimum of upgrades or improvements. Wildblue Satellite's email server was so crappy that they've actually contracted with Google to provide reliable service.

Meanwhile, over the last 4-5 years the ISP's have arbitrarily turned on port 25 blocking on parts of their network in rolling implementations and left many thousands of users with confusion and frustration. Of course, if windows users weren't so susceptible to becoming part of a spambot we wouldn't have the problem to deal with in the first place.

I've had the same local Telco ISP blame both Apple Leopard Mail program and Microsoft's Vista Mail program on the same day for the same problems. Turned out the ISP couldn't figure out how to set their security certificate.

My clients don't realize they are being driven away by a support system that really doesn't want to deal with issues they themselves don't understand. They just get told to delete the email account and start again, what, what do you mean all of the messages are gone? 🙂

Jul 16, 2009 1:47 PM in response to Ernie Stamper

Tech was definitely reading off an instructions page. Nice enough kid, even said he had a Mac at home, but still all he could suggest was to contact Apple. I called them back and that tech wrote down the steps to have their info. updated. It makes sense as you said that if 25 were not available, as it seems they say it won't be, then Mail would choose another port, there were 3 listed when I first went into preferences. But I did change it to only use 587, as the original e-mail requested and will try 110 if 587 fails me.

Jul 16, 2009 1:51 PM in response to dechamp

I will consider the free e-mail as you mentioned. My only qualm is that I had one before and it was a nightmare to get the account closed. Most folks likely don't care if the old acct is still out there but i got virused on my old Microsoft unit from someone that hacked into a friends defunct e-mail account that was never officially closed when she abandoned it. Thanks for the great info. This forum stuff is a wealth of knowledge if you have time to peruse around in it.

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Default port Mail uses to send e-mail

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