Everytime you check the mail, you need to go out of where you are. and sometimes lose progress in mazes. This is why I suggest the portable mailbox. It can get and send mail anywhere.
A tip if this isn't implemented though (but it won't be available after Revelius). If you are in an area where you can do /housing, you can visit your housing (or someone else's who has a mailbox) and read your mail there, then do /worlds to return to where you were.
Yes, but after the update, you will only be able to go to your housing in specific areas, so it won't be as effective and you couldn't use it in most places.According to the Q&A, this will actually be possible. I remember them saying at one point that if you went to your housing and then back, you would still be in the same spot. I'm rewatching the Q&A right now, so I'll let you know if I find the time stamp.
I find it surprising to know that only a few people know that this is actually a feature you can currently already use in the server. If you're in housing and use /world to get back to the main server, you end up at the exact spot where you left to housing.I remember them saying at one point that if you went to your housing and then back, you would still be in the same spot.