[SOLVED] No sync when connected to 3G mobile network with IMAP account web.de

[c.monty]

Hello!

Since the installation of CM12.1 I'm facing an issue with synchronizing my IMAP account from email-provider web.de when connected to 3G mobile network.
As soon as I switch to WLAN, the sync is working.

This indicates that there's a restriction with CM12.1 blocking the communication while connected to 3G network.

Interesting in this context is that another mail-account Gmail is not affected by this issue.

I have attached a logfile for a relevant sync attempt that fails.

There's no other app installed that could block the communication with mailservers from web.de.

Any advice to troubleshoot this issue is appreciated.

THX


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Update

Issue was caused by selection of wrong APN.
After changing the APN the 3G network connection sync was working correctly.

[mikeone]

Hi, the sole developer of AquaMail, Kostya Vasilyev, is on vacation until 17th September 2015.
So sorry for any inconvenience with AquaMail on CM 12.1 right now.
Kind regards
Mikeone

[Kostya Vasilyev]

Thank you for the log.

imap.web.de has two IP addresses, AquaMail was trying to use 212.227.17.178 and it was failing -- timing out.

I am able to connect to either address (that or 212.227.17.162) from my desktop in Russia so the servers are OK.

I'd be very very surprised if this was related to CM, it has to be your mobile provider. That you're not seeing the issue on WiFi is another confirmation point.

As an aside -- network errors reported by AquaMail really are "genuine", I've not seen any in a long time where it was the app's fault.