The couple times my T has been out of town, he's let me know that he'll be checking e-mail at least once a day and that it's OK to contact him that way. One time he said he could respond if I was in crisis. He only allows text for scheduling in general and doesn't do phone calls since he'd rather just schedule an extra session and meet in person (though don't know if he'd make an exception if a client was struggling while he was out of town). I don't know if this is always his policy, like if he always checks e-mail when he's away or if it depends (I mean, I assume if he was in some remote area where he couldn't get cell service or Wifi he wouldn't).

Ex-T did not read or respond to e-mails/texts/calls while on vacation--though I guess I never really tested that--she just never offered when she said she'd be out of town. But for most of the time I was seeing her, I was also seeing my former marriage counselor, so she would just say I could contact him if I needed anything. And when he was out of town, he'd generally say I could contact her. But I think he was OK with texts/e-mails when out of town--can't recall if he responded to any then or not though.