Email Account Issue - Outgoing Email varies with ISP

NYSpeed Automotive NYSpeed Off Topic
1

I have a new email address with 1and1 (I know, not my choice) and it seems that depending on what wireless network I am connected to, my ability to send emails is bunko.

Most hosts I have work fine, but for example there are 2 available wireless networks that I see in my hotel. Via one I can send & receive, but the other I can only receive email.

Some people have used www.authsmtp.com to work around this but this seems retarded. Any idea why this may be happening? Outoing is on port 25.

Searched and can’t find anything similar, figure some supernerds may be able to shed some light.

2

They are probably not letting you send email from the hotel IPs.

Use their webmail or see if 1and1 has SMTP authentication

Are you using 1and1s server for SMTP?

3

It does require SMTP auth.

Is it more likely that its a 1and1 side issue?

4

weird

Usually you have this issue if the other server doesn’t have SMTP Auth and they use some sort of IP based allow list.

Another example would be traveling and using POP3/SMTP from Timewarner but plugging into a verizon network usually the SMTP server wouldn’t allow you to send mail.

Is your email client kicking back an error message?

5

I may try this when I get back, seems in line with what I was thinking… that for some reason they were blocking that port.

http://faq.oneandone.co.uk/communication/e_mail/troubleshooting/10.html

Outlook is kicking back an error but I can’t remember what it is, I’ll post when I get back to ze room later.

6

Yea I wasn’t thinking about the port blocking that makes sense a lot of organizations block port 25 out to prevent spamming and only allow access to their SMTP server.

However it seems stupid for a hotel to do this…

7

That fixed it…

8

Yeah, we are running into this a lot lately. Particular ISPs ,Att/SBCGlobal, Verizon and TDS, have started blocking port 25…switching them to 587 with SMTP auth usually take care of that